SEO comes with its own vocabulary. Some terms describe how search engines actually work. Others come from analytics platforms, SEO tools, developers, agencies, or the wider marketing industry.
That distinction matters. A metric such as Domain Authority can be useful, but it is not a score Google assigns to your website. A canonical tag can help search engines understand duplicate URLs, but it is not the same thing as redirecting one URL to another. A page can also be crawlable without being indexed.
This SEO glossary explains 120 common SEO terms in plain English, with enough context to understand why each one matters. It covers SEO fundamentals, keywords, on-page SEO, technical SEO, links, local search, e-commerce, measurement and newer AI-search terminology.
It is designed as a reference. You do not need to read all 120 definitions in order.
How to Use This SEO Glossary
When you encounter an unfamiliar SEO term, use a simple four-question framework:
- What does the term mean?
- Who defines it?
- What does it affect?
- What action, if any, should you take?
That second question prevents a surprising amount of confusion.
For example, Google defines concepts such as crawling, indexing and PageRank within its search systems. Domain Rating, by contrast, is an Ahrefs metric. Keyword Difficulty is calculated differently across SEO platforms. AEO and GEO are industry labels rather than special settings that must be enabled in Google.
Google's own SEO Starter Guide describes SEO as helping search engines understand content while helping users discover a site through search. Google also makes clear that there are no secret techniques that automatically place a page first.
A Practical SEO-Term Checklist
When an SEO report, audit or proposal uses unfamiliar terminology, check the following:
- Is the term an official search-engine concept or industry shorthand?
- Is a reported number measured directly or estimated by a third-party platform?
- Is the recommendation addressing crawling, indexing, ranking, usability or conversion?
- Does the proposed change affect one URL, a page template or the whole site?
- Can the recommendation be tested before and after implementation?
- Is the claim supported by search-engine documentation, web standards or reliable data?
- Would the recommendation still make sense if the SEO acronym were removed?
The last question is especially useful. Good SEO recommendations should remain understandable when expressed in ordinary business language.
SEO Foundations & Search
These first 15 SEO terms describe the basic mechanics and vocabulary of organic search.
1. SEO (Search Engine Optimization)
SEO is the practice of improving a website so search engines can understand its pages and people can discover those pages when searching for relevant information, products or services.
SEO usually combines technical accessibility, useful content, page relevance, internal linking, site architecture, authority and measurement. It is broader than adding keywords to pages.
2. Search Engine
A search engine is a system that discovers, processes and retrieves information in response to a user's query.
Google and Bing are the most familiar examples in traditional web search. Search engines generally crawl available content, organize eligible information in indexes and use automated systems to determine which results are useful for a particular search.
3. SERP
SERP stands for search engine results page. It is the page or interface a search engine displays after someone submits a query.
A SERP can contain conventional organic listings as well as ads, local results, images, videos, featured snippets, People Also Ask boxes, shopping results, AI-generated experiences and other features.
4. Organic Search
Organic search refers to unpaid search-engine results.
A page appearing organically is not paying for that specific placement as an advertisement. Organic visibility is influenced by a search engine's ranking systems, page relevance, accessibility, quality and many other signals.
Organic search is separate from paid search, although both may appear on the same SERP.
5. Organic Traffic
Organic traffic is website traffic attributed to unpaid search-engine results.
Analytics platforms typically classify visits by source and channel, so exact reporting can depend on tracking configuration. For businesses, organic traffic is usually more useful when evaluated alongside conversions, qualified leads, revenue or other meaningful outcomes rather than as a standalone volume metric.
6. Search Query
A search query is the actual phrase, question or command a person enters into a search engine.
A keyword is usually the phrase an SEO team chooses to research or target. A query is what the user actually searched.
For example, a page might target the keyword "technical SEO," while users reach it through dozens of related queries.
7. Search Intent
Search intent is the underlying goal behind a query.
Someone searching "what is a canonical tag" probably wants an explanation. Someone searching "technical SEO agency Toronto" is more likely evaluating a service provider.
Understanding intent helps determine whether a query should be answered with a guide, service page, product page, comparison, local landing page or another format.
8. Ranking
A ranking is the position or placement a search result receives for a particular query and search context.
Rankings are not permanent universal numbers. Results can vary by location, device, language, freshness, personalization and the SERP features Google chooses to show.
For that reason, ranking reports should be interpreted alongside impressions, clicks and business outcomes.
9. Ranking Systems
Ranking systems are automated systems search engines use to evaluate and order eligible results.
Google describes its systems as considering many factors and signals across enormous amounts of indexed content. Its published ranking systems guide also identifies systems involving link analysis, PageRank, freshness, neural matching and other functions.
A ranking system is not the same thing as one simple formula.
10. Algorithm Update
An algorithm update is a change to the automated systems or processes a search engine uses.
Some updates are significant enough for Google to announce publicly. Others happen without individual announcements.
An observed ranking change does not automatically prove that a particular update caused it. Technical problems, competition, changing demand, site changes and SERP layouts can produce similar effects.
11. Core Update
A core update is a broad change Google makes to its core search systems.
Core updates are not usually about one single SEO tactic. They can change how Google's systems assess and surface content across many topics and sites.
The appropriate response is generally to evaluate the overall quality, usefulness, accuracy and competitiveness of the affected pages rather than search for one universal fix.
12. Manual Action
A manual action occurs when a human reviewer at Google determines that pages or a site do not comply with Google's spam policies and applies an action affecting search visibility.
This is different from an ordinary ranking decline caused by automated systems.
Site owners can view reported manual actions through Google Search Console.
13. Search Spam
Search spam is content or behaviour intended to manipulate search results in ways that violate a search engine's policies.
Examples can include certain forms of link manipulation, cloaking, scaled low-value content and other deceptive practices.
Not every poor SEO tactic is formally classified as spam, so the term should be used carefully.
14. White Hat SEO
White hat SEO is an industry term for optimization practices intended to follow search-engine guidelines.
Typical examples include improving crawlability, publishing useful content, strengthening site architecture and earning legitimate mentions.
It is not an official Google certification or status. It is shorthand used by the SEO industry.
15. Black Hat SEO
Black hat SEO is industry shorthand for tactics intended to manipulate search rankings while violating, or coming close to violating, search-engine policies.
Examples may involve hidden content, manipulative links or other deceptive techniques.
The important issue is not the label itself. It is whether a practice complies with applicable search policies and creates sustainable value for users.
Keywords, Content & Relevance
Keywords still matter, but modern SEO is not built around repeating one phrase a certain number of times. This area of SEO is better understood as matching pages to topics, search intent and audience needs.
For businesses building useful organic assets, our content marketing approach connects keyword research with content architecture, subject expertise and measurable search opportunities.
16. Keyword
A keyword is a word or phrase an SEO practitioner uses to represent a search topic or opportunity.
The term often appears in keyword research tools, content briefs and reporting.
A keyword should not be confused with every exact query a user enters. One target keyword may correspond to many semantically related searches.
17. Primary Keyword
A primary keyword is the main search phrase a page is designed to address.
It helps an SEO or content team define the page's central topic and intent. It is an editorial planning concept rather than a field that must be submitted to Google.
A useful primary keyword should align closely with what the page genuinely answers.
18. Secondary Keyword
A secondary keyword is a related search term that supports the main topic of a page.
Secondary keywords may represent synonyms, subtopics, closely related concepts or alternate phrasing.
They are most useful as research signals. Forcing every secondary keyword into the copy can make content less natural rather than more relevant.
19. Long-Tail Keyword
A long-tail keyword is a relatively specific search phrase, often with narrower intent than a broad head term.
"SEO" is extremely broad. "How to fix duplicate product pages in Shopify" is much more specific.
Long-tail queries may have lower individual search volumes, but they can closely reflect a user's actual problem or buying stage.
20. Branded Keyword
A branded keyword contains the name of a company, product, service or recognizable brand.
Examples include "Google Search Console" and "SEO Team Toronto."
Branded search demand can reveal awareness or existing interest, while rankings for a company's own brand should generally be separated from non-branded SEO performance when evaluating acquisition.
21. Non-Branded Keyword
A non-branded keyword does not contain the business or product brand being measured.
Examples might include "local SEO company" or "technical SEO audit."
Non-branded visibility is often useful for understanding whether a site is reaching people who have a relevant need but may not already know the company.
22. Keyword Difficulty
Keyword Difficulty is a third-party estimate of how difficult an SEO platform believes it may be to rank for a keyword.
There is no universal Keyword Difficulty formula. Ahrefs, Semrush and other tools calculate their scores differently.
Treat the metric as comparative research data, not as a Google score or prediction of what will happen.
23. Search Volume
Search volume is an estimate of how often people search for a keyword during a given period, usually expressed as average monthly searches.
Different platforms can report different numbers because their datasets and modelling methods differ.
Volume is useful for prioritization, but a lower-volume term with strong business intent may be more valuable than a broad high-volume query.
24. Keyword Cannibalization
Keyword cannibalization occurs when multiple pages on the same site compete for substantially the same search intent in a way that weakens clarity or performance.
Having several pages mention the same keyword is not automatically cannibalization.
The real issue is whether the site has created multiple URLs that are trying to serve the same purpose without a clear reason.
25. Keyword Clustering
Keyword clustering is the process of grouping related keywords based on shared topic, meaning or search intent.
Instead of creating one page for every slight keyword variation, a team can identify which terms belong together and which need distinct pages.
Good clustering reduces unnecessary content duplication and supports cleaner site architecture.
26. Topical Authority
Topical authority is an SEO industry concept describing how comprehensively and credibly a website covers a subject area.
It is not a single Google metric that can be checked in Search Console.
In practice, strong topical coverage often involves connected pages that answer important user questions, demonstrate expertise and link logically to one another.
27. Topic Cluster
A topic cluster is a group of related pages organized around a broader subject.
For example, a technical SEO cluster could include pages about crawling, indexation, JavaScript SEO, Core Web Vitals, site migrations and structured data.
Internal links help users and search engines understand how those pages relate.
28. Pillar Page
A pillar page is a comprehensive resource covering a broad topic and linking to narrower supporting content.
This glossary is an example of a potential pillar asset. Individual definitions can later link to deeper articles, while related articles can point readers back to specific glossary definitions.
The concept comes from content strategy, not an official Google page type.
29. Content Gap
A content gap is a useful topic, question or intent that a website does not adequately cover.
SEO teams may identify gaps by reviewing competitors, search results, customer questions, sales conversations and keyword datasets.
A competitor ranking for a term does not automatically mean you need an equivalent page. The missing topic still needs to matter to your audience.
30. Evergreen Content
Evergreen content is material designed to remain useful beyond a short news cycle.
Definitions, foundational guides and tutorials are common examples.
Evergreen does not mean maintenance-free. SEO terminology changes, products are renamed, metrics evolve and search engines revise documentation, so long-lived resources still require periodic review.
On-Page SEO & HTML
On-page SEO concerns the content and HTML elements of individual pages, along with how those pages communicate meaning and relevance.
Our on-page SEO services focus on aligning page targeting, content, metadata, internal links and structured elements with the searches each page is meant to satisfy.
31. On-Page SEO
On-page SEO is the process of improving individual web pages so their content, structure and purpose are clear to users and search engines.
It can include title tags, headings, body copy, internal links, media, metadata, structured data and intent alignment.
On-page SEO is different from technical SEO, although the two often overlap.
32. Title Tag
A title tag is an HTML element that specifies a page title.
Search engines can use it when generating a search-result title, although Google may display different wording when its systems determine another title better represents the page.
A strong title is descriptive, concise and aligned with the page's actual content.
33. Meta Description
A meta description is an HTML element that provides a short description of a page.
Search engines may use the supplied description in search snippets, but they can also generate snippets from page content depending on the query.
Meta descriptions are therefore best treated as useful search-result copy, not guaranteed SERP text.
34. H1 Tag
An H1 is an HTML heading normally used for the primary visible heading of a page.
A clear H1 helps users understand the page topic and contributes to a logical document structure.
It does not need to be an exact duplicate of the title tag, although the two should generally describe the same page purpose.
35. Heading Tags
Heading tags are HTML elements such as H1, H2, H3 and H4 that establish the hierarchy of headings on a page.
They improve readability, accessibility and content organization.
Headings should describe the sections beneath them rather than function as containers for repeated keywords.
36. Alt Text
Alt text, or alternative text, describes the purpose or content of an image for situations where the image cannot be perceived normally, including users relying on assistive technology.
Useful alt text is contextual and concise.
Its primary purpose is accessibility and understanding, not providing another location to insert keywords.
37. Anchor Text
Anchor text is the clickable text of a hyperlink.
Descriptive anchor text helps users understand where a link leads and gives search engines context about the destination page.
Natural wording such as "technical SEO services" is generally more useful than generic wording such as "click here."
38. Internal Link
An internal link connects one page on a domain to another page on the same domain.
Internal links help people navigate, distribute attention across important pages and provide search engines with pathways to discover and understand content.
They are also useful for establishing relationships among service pages, resources and topic clusters.
39. External Link
An external link points from your website to a page on another domain.
External links can support claims, direct readers to original research or documentation and provide additional context.
Linking to a credible source does not substitute for writing a complete explanation on your own page.
40. Canonical Tag
A canonical tag uses rel="canonical" to indicate the URL a site prefers search engines to treat as representative when multiple URLs contain duplicate or very similar content.
Google describes canonicalization as a way to consolidate signals around a preferred URL. Its canonicalization documentation also makes clear that canonical annotations are signals rather than a replacement for every other URL-management method.
A canonical does not send a user somewhere else. A redirect does.
41. Structured Data
Structured data is machine-readable markup that describes information on a page using an organized vocabulary.
Search engines may use supported structured data to understand page content and enable certain search features when eligibility requirements are met.
Structured data should accurately match visible page content.
42. Schema Markup
Schema markup commonly refers to structured data using vocabulary from Schema.org.
Schema.org provides shared types and properties for describing things such as organizations, products, events, articles and people.
Adding schema does not guarantee a rich result or improved ranking.
43. Breadcrumbs
Breadcrumbs are navigational links that show where a page sits within a site's hierarchy.
A path might read:
Home > Services > SEO > Technical SEO
Breadcrumbs can help users orient themselves and reinforce logical site architecture. Search engines can also use supported breadcrumb structured data when presenting certain search results.
44. URL Slug
A URL slug is the portion of a URL that identifies a specific page, normally after the domain and any folders.
For example, the slug in /blog/seo-glossary is seo-glossary.
Good slugs are usually short, descriptive and stable. Stuffing multiple keyword variations into a URL rarely improves clarity.
45. Keyword Stuffing
Keyword stuffing is the excessive or unnatural repetition of keywords in an attempt to influence search visibility.
It can appear in body text, headings, metadata, anchors or other page elements.
Good SEO copy uses the vocabulary needed to explain a topic naturally. Repetition that makes the page awkward or less useful works against that goal.
Technical SEO, Crawling & Indexing
Technical SEO focuses on whether search engines can efficiently access, render, understand and process the pages a business wants visible.
Our technical SEO work often begins with these fundamentals because content cannot perform as intended when important URLs are blocked, duplicated, misdirected or difficult to process.
46. Technical SEO
Technical SEO is the practice of improving the technical conditions that affect how search engines access, interpret and process a website.
Common areas include crawling, indexing, site architecture, redirects, canonicalization, sitemaps, JavaScript, structured data, performance and migrations.
It often requires coordination between SEO, development and platform teams.
47. Crawler
A crawler is automated software that discovers and retrieves web content by following links, reading known URLs and using other discovery methods.
Search engines operate crawlers to find pages they may process for search.
Crawlers are also called spiders or bots, although those words can describe many types of automated software.
48. Googlebot
Googlebot is Google's web crawler for Google Search.
Googlebot requests URLs, retrieves available resources and contributes to Google's process of discovering and processing web content.
A server can encounter different Google crawlers for different products, so log-file analysis should distinguish legitimate crawler identities carefully.
49. Crawling
Crawling is the process of a search-engine bot discovering and requesting web pages and resources.
A crawled page is not necessarily indexed, and a page can be crawled repeatedly without appearing in search results.
This distinction is fundamental to diagnosing SEO problems.
50. Crawlability
Crawlability describes whether search-engine crawlers can access and retrieve a URL or its important resources.
A page may have crawlability problems because of robots.txt rules, authentication, server errors, broken internal links or other barriers.
Crawlability is one condition for discovery and processing, not a ranking guarantee.
51. Crawl Budget
Crawl budget is SEO shorthand for the amount and pattern of crawling a search engine is willing and able to conduct on a site.
It becomes more relevant on very large or frequently changing websites than on small sites with a few hundred stable pages.
Large numbers of duplicate, filtered or low-value URLs can waste crawler attention and complicate discovery.
52. Index
A search engine's index is the organized collection of content and information it has processed for potential retrieval in search results.
Being in the index makes a page eligible for consideration. It does not guarantee that the page will rank for any particular query.
Search engines decide which indexed pages are relevant at search time.
53. Indexing
Indexing is the process through which a search engine analyzes and stores information about content for potential use in search results.
Indexing comes after discovery and crawling in the simplified search process.
A crawled URL may remain unindexed for many reasons, including duplication, directives, quality assessments or processing decisions.
54. Indexability
Indexability describes whether a page is technically eligible to be indexed.
A page with a valid noindex directive is not indexable by the search engine respecting that directive. A URL blocked from crawling can produce a different situation because the crawler may not be able to see page-level directives at all.
Indexability should therefore be diagnosed separately from crawlability.
Crawling vs. Indexing vs. Ranking
A useful model is:
- Crawling: Can the search engine access the page?
- Indexing: Can and does the search engine include the page in its searchable index?
- Ranking: When the page is eligible, where is it surfaced for relevant queries?
A ranking problem cannot always be solved with content changes. If a page is accidentally excluded from indexing, technical eligibility comes first.
55. Robots.txt
robots.txt is a text file located at the root of a site that gives supported web crawlers instructions about which URL paths they may crawl.
Google's robots.txt documentation distinguishes crawling controls from indexing controls.
Robots.txt should therefore not be treated as a reliable replacement for noindex.
56. Meta Robots Tag
A meta robots tag is page-level HTML metadata that provides supported crawler and indexing instructions.
Common directives include noindex, nofollow, nosnippet and related controls.
Because the directive exists in the page HTML, the search engine normally needs access to the page before it can read it.
57. Noindex
Noindex is a directive telling a supporting search engine not to include a page in its search index.
It is commonly implemented through a meta robots tag or supported HTTP header.
Noindex is useful for pages that should remain accessible to users or crawlers but should not appear in search results.
58. XML Sitemap
An XML sitemap is a machine-readable file listing URLs a site wants search engines to know about.
Sitemaps are especially useful for large sites, new sites, complex architectures and URLs that may otherwise be difficult to discover.
Including a URL in a sitemap does not guarantee that it will be crawled, indexed or ranked.
59. HTTP Status Code
An HTTP status code is a server response indicating what happened when a browser or crawler requested a URL.
Codes beginning with 2 typically indicate successful responses, 3 indicate redirects, 4 indicate client-side request problems such as missing pages, and 5 indicate server errors.
SEO audits commonly monitor status-code patterns because they affect access and URL handling.
60. 301 Redirect
A 301 redirect is an HTTP response indicating that a resource has moved permanently to another URL.
It is commonly used when permanently consolidating old URLs into appropriate replacements.
A 301 changes where browsers and crawlers are sent, which is why it serves a different purpose from a canonical tag.
61. 302 Redirect
A 302 redirect traditionally indicates a temporary redirect.
It may be appropriate when a move is genuinely temporary and the original URL is expected to return.
SEO teams should choose redirect behaviour based on the intended permanence of the change rather than habitually using one status code everywhere.
62. 404 Not Found
A 404 status means the server could not find the requested resource.
A 404 is not automatically an SEO problem. If a page has intentionally been removed and has no suitable replacement, returning a proper not-found response can be correct.
Problems arise when valuable URLs disappear accidentally or important internal links point to missing pages.
63. 410 Gone
A 410 Gone response indicates that a requested resource is no longer available and that its removal is intentional.
Both 404 and 410 responses can be appropriate for removed content.
Teams rarely need to obsess over choosing between them for ordinary removals. The more important decision is whether a relevant replacement exists and whether users are being sent somewhere useful.
301 vs. 302 vs. 404 vs. 410
Use this practical decision tree:
- The page moved permanently: use an appropriate permanent redirect, typically 301.
- The move is genuinely temporary: consider a temporary redirect such as 302.
- The page is gone and there is no equivalent replacement: return a proper 404 or 410.
- Several pages are being consolidated: redirect each old URL to the most relevant surviving destination.
Redirecting every removed URL to the homepage usually creates a poor experience and hides useful information about what changed.
64. Orphan Page
An orphan page is a URL with no meaningful internal links pointing to it from the site's normal architecture.
Search engines may still discover orphan pages through sitemaps, backlinks or previous crawls, but users and crawlers have fewer normal paths to reach them.
Important pages should generally be integrated into a logical internal-link structure.
65. Faceted Navigation
Faceted navigation lets users filter or sort collections using attributes such as size, colour, location, category or price.
It is common on e-commerce and directory websites.
Facets can create very large numbers of parameterized URLs. Without deliberate controls, this can lead to duplicate pages, inefficient crawling and unclear indexation.
Mini Example: When More URLs Create Less Clarity
Consider an anonymized Canadian e-commerce site with roughly 8,000 core category and product URLs. Its filtering system created hundreds of thousands of additional combinations for colour, size, price and sort order.
The issue was not that filtering was bad for shoppers. The problem was that search engines could access many near-duplicate URL combinations while key category pages had weak internal signals.
The practical fix was a combination of URL rules, internal-link cleanup, canonical review, sitemap cleanup and selective indexability decisions. No single tag solved the problem. The site needed each technical control to perform the job it was designed for.
Performance, UX & Site Architecture
Search engines need technically accessible pages, but people also need pages that work well once they arrive.
Performance metrics provide useful diagnostic information, while site architecture determines how easily both users and crawlers can move through a website.
66. Core Web Vitals
Core Web Vitals are Google's metrics for important aspects of real-world page experience, currently focusing on loading performance, responsiveness and visual stability.
The three current metrics are LCP, INP and CLS.
Google recommends good Core Web Vitals while also emphasizing that page experience involves more than these three measurements.
67. Largest Contentful Paint (LCP)
Largest Contentful Paint, or LCP, measures how quickly the largest relevant content element becomes visible in the viewport.
Google's current guidance defines a good LCP as within 2.5 seconds for most user visits.
Large hero images, slow servers and render-blocking resources are common contributors to poor LCP.
68. Interaction to Next Paint (INP)
Interaction to Next Paint, or INP, measures page responsiveness by assessing the delay between user interactions and the next visual update.
Google currently recommends an INP below 200 milliseconds for a good experience.
Heavy JavaScript and long main-thread tasks can contribute to poor responsiveness.
69. Cumulative Layout Shift (CLS)
Cumulative Layout Shift, or CLS, measures unexpected movement of visible page elements while a page is being used.
Google currently identifies a CLS score below 0.1 as good.
Images without reserved dimensions, dynamically inserted content and unstable ad placements can contribute to layout shifts.
70. Page Speed
Page speed is a broad description of how quickly a page loads and becomes usable.
It should not be reduced to one universal score.
Lab tools, field data and individual performance metrics measure different aspects of the experience, so optimization should focus on actual bottlenecks rather than chasing a perfect tool score.
71. Page Experience
Page experience describes the overall experience a person has while using a webpage.
Performance matters, but so do mobile usability, intrusive interfaces, security, accessibility and the basic ability to consume the content.
A fast page with poor information or frustrating navigation is still a poor page.
72. Mobile-First Indexing
Mobile-first indexing means Google primarily uses the mobile version of a site's content for indexing and related search processing.
This makes content parity important. Critical text, internal links, structured data and metadata should not disappear simply because a visitor is using the mobile version.
Responsive design can simplify that consistency.
73. HTTPS
HTTPS is the secure version of HTTP, using encryption to protect data transferred between a user's browser and a website.
Modern websites should use HTTPS consistently.
SEO migrations from HTTP to HTTPS also require proper redirects, canonical URLs, internal links and supporting configuration so the secure URLs become the clear preferred versions.
74. Information Architecture
Information architecture is the way a website organizes and labels its content.
In SEO, good architecture usually means important subjects and pages have clear relationships, sensible navigation and reasonable click paths.
A service page buried behind unrelated categories is harder for users to find and can also weaken contextual signals within the site.
75. JavaScript SEO
JavaScript SEO is the practice of ensuring content and links produced through JavaScript applications remain accessible and understandable to search engines.
JavaScript itself is not inherently bad for SEO.
Problems arise when important content depends on rendering behaviour that crawlers cannot reliably access, or when client-side navigation creates inconsistent URLs, metadata or internal links.
Links, Authority & Off-Page SEO
Links remain an important part of how the web is connected. They can provide discovery paths, context and authority signals, but link quality cannot be reduced to a raw backlink count.
SEO Team Toronto's off-page SEO approach focuses on relevant, editorially defensible authority rather than treating every link as equally valuable.
76. Off-Page SEO
Off-page SEO refers to SEO activity involving signals and exposure beyond the pages directly controlled on your website.
It commonly includes backlinks, digital PR, brand mentions and certain local authority signals.
The purpose should be to strengthen real reputation and discoverability, not manufacture artificial popularity.
77. Backlink
A backlink is a link from another website to your website.
Backlinks can help search engines discover pages and understand how sites connect across the web.
Their value varies significantly. A relevant editorial link from a credible publication is not equivalent to hundreds of unrelated automated links.
78. Link Building
Link building is the process of acquiring backlinks to a website.
Legitimate approaches can include digital PR, original research, useful tools, expert contributions, partnerships and outreach around genuinely relevant resources.
Link-building activity should be evaluated against search-engine spam policies, not simply by how quickly links can be obtained.
79. Link Equity
Link equity is an SEO industry term describing the value or ranking influence that may pass through links.
You may also hear the informal phrase "link juice."
There is no Google dashboard showing a page's exact link equity. The concept is useful for understanding internal and external linking, but it should not be treated as a measurable Google score.
80. PageRank
PageRank is a link-analysis system associated with Google's original search technology.
Google states that PageRank has evolved considerably but continues to be part of its core ranking systems.
PageRank should not be confused with Domain Authority, Domain Rating or old public toolbar PageRank scores.
81. Nofollow
Nofollow commonly refers to the rel="nofollow" link attribute.
It was introduced as a way to indicate that a site did not want to associate a standard endorsement signal with a link. Google's handling of link attributes has evolved, and nofollow is now treated as a hint for certain search purposes.
It is not a method for hiding links from users.
82. Sponsored Link Attribute
The sponsored link attribute uses rel="sponsored" to identify links created as part of advertisements, sponsorships or other compensated arrangements.
It gives search engines explicit context about the commercial relationship.
Using appropriate link attributes is part of responsible paid-link implementation.
83. UGC Link Attribute
The UGC link attribute uses rel="ugc" for links within user-generated content, such as forum posts and comments.
It helps distinguish links placed by users from links editorially placed by the site owner.
Not every website needs it, but it can be useful on platforms with substantial community-generated content.
84. Link Spam
Link spam involves creating, acquiring or manipulating links in ways intended primarily to distort search rankings and contrary to search-engine spam policies.
Examples can include certain paid-link schemes or large-scale artificial linking arrangements.
A backlink strategy should therefore be judged on relevance, editorial legitimacy and policy compliance rather than volume alone.
85. Digital PR
Digital PR uses newsworthy stories, expert commentary, research, data and media relationships to earn online coverage.
From an SEO perspective, strong digital PR may generate authoritative links and brand mentions.
Its value is broader than links because good coverage can also build reputation, referral traffic and branded demand.
86. Domain Authority (DA)
Domain Authority, or DA, is a third-party metric developed by Moz that estimates a domain's relative ability to rank based partly on link-related data.
DA is not a Google metric and Google does not use a site's Moz DA score as a ranking factor.
It can be useful for comparisons when its limitations are understood.
87. Domain Rating (DR)
Domain Rating, or DR, is an Ahrefs metric describing the relative strength of a website's backlink profile on its own scoring scale.
Like DA, DR is not a Google score.
A high DR does not guarantee that a site is relevant, trustworthy for a specific topic, or capable of ranking for every query.
PageRank vs. DA vs. DR
These three terms are often mixed together:
- PageRank: part of Google's link-analysis history and current core ranking systems.
- Domain Authority: a Moz-created comparative metric.
- Domain Rating: an Ahrefs-created comparative metric.
DA and DR can help with third-party research. Neither should be presented to a client as Google's opinion of a domain.
88. Referring Domain
A referring domain is a unique external domain that links to your website.
If one publication links to your site from 20 articles, that creates 20 backlinks but only one referring domain.
Both measurements can be useful, although neither says much about quality without reviewing the relevance and credibility of the linking sources.
89. Link Reclamation
Link reclamation is the process of recovering or improving links that a website reasonably should already have.
Examples include asking a publisher to update a broken link after a URL migration or correcting a link that points to the wrong version of a page.
It is often more defensible than pursuing unrelated new links simply to increase counts.
90. Unlinked Brand Mention
An unlinked brand mention occurs when another website mentions a company, product or person without linking to the relevant website.
Some unlinked mentions can become legitimate outreach opportunities if adding a link would help the publication's reader.
Not every mention needs a link, and outreach should respect the publisher's editorial judgment.
Local, E-Commerce, International & Enterprise SEO
SEO changes as websites become more geographically focused, transactional or technically complex.
A Toronto dental clinic, a Canada-wide retailer and a multinational enterprise may all rely on Google Search, but they face different architecture, location, inventory and governance problems.
91. Local SEO
Local SEO focuses on improving visibility for searches influenced by geographic relevance.
It matters for businesses such as clinics, contractors, restaurants, professional services and multi-location organizations.
Our local SEO services address both traditional website optimization and location-specific signals such as Google Business Profile accuracy and local landing pages.
92. Google Business Profile (GBP)
A Google Business Profile, commonly abbreviated GBP, is Google's business listing system for eligible organizations.
Profiles can display information such as business name, address, service area, phone number, hours, reviews, photos and website links across Google surfaces.
Accurate profile information is particularly important for local search visibility and customer trust.
93. Local Pack
The Local Pack is the group of geographically relevant business listings Google can show for searches with local intent.
It commonly includes a map and several business results.
Local Pack visibility is distinct from conventional organic website rankings, although a business's website and broader web presence can still be important parts of its local search strategy.
94. NAP (Name, Address, Phone)
NAP stands for Name, Address and Phone number.
The acronym is used in local SEO when discussing the consistency and accuracy of a business's core contact information.
The practical objective is straightforward: customers and platforms should receive reliable information about who the business is and how to contact or locate it.
95. Local Citation
A local citation is an online reference to a business, often including its name, address, phone number or other identifying information.
Citations can appear in business directories, association profiles, maps and industry websites.
Quality and accuracy are more important than submitting a business to every directory that exists.
96. Review Signals
Review signals is an SEO industry phrase referring to information associated with customer reviews, such as rating patterns, volume, freshness and content.
Reviews can influence customer decisions and are significant within local platforms.
Be cautious with blanket claims that one particular review count or keyword formula directly determines local rankings.
97. E-Commerce SEO
E-commerce SEO is the practice of improving organic visibility for online stores.
It can involve product pages, category architecture, faceted navigation, structured data, inventory states, internal linking, duplicate URLs and merchant information.
Large product catalogues often make technical consistency as important as individual page copy.
98. Product Structured Data
Product structured data is schema markup used to describe product information in a machine-readable format.
Supported properties can communicate details such as offers, availability, ratings or product identifiers when implemented accurately.
Markup should match the information visible to shoppers and comply with the requirements of any search feature being targeted.
99. Google Merchant Center
Google Merchant Center is a Google platform through which merchants can provide product and business data used across Google shopping experiences.
It is relevant to both paid and eligible organic product exposure.
For e-commerce teams, Merchant Center data quality and website SEO should be coordinated rather than managed as entirely unrelated systems.
100. International SEO
International SEO involves optimizing websites that serve audiences across multiple countries, regions or languages.
Key decisions include site structure, translation, localization, hreflang, country targeting and content duplication.
International SEO should begin with real audience and business requirements, not with creating dozens of country folders for hypothetical traffic.
101. Hreflang
Hreflang is an HTML attribute used to communicate language and regional variants of equivalent pages to search engines.
For example, a company might have different English pages for Canada and the United States.
Hreflang implementation is reciprocal and detail-sensitive, so large international sites commonly require automated validation.
102. ccTLD
A ccTLD, or country-code top-level domain, is a domain extension associated with a country or territory.
Examples include .ca for Canada and .uk for the United Kingdom.
A ccTLD can send a strong geographic signal, but it also creates operational considerations when a company manages multiple country-specific sites.
103. Enterprise SEO
Enterprise SEO is SEO conducted at the scale and organizational complexity of large websites or businesses.
The work may involve millions of URLs, multiple development teams, international markets, complex approval processes and significant technical dependencies.
At this scale, governance, prioritization and automation can matter as much as identifying SEO problems.
104. Site Migration
A site migration is a substantial website change that can affect URLs, hosting, domain structure, platform architecture, content or another element important to search visibility.
Examples include domain moves, HTTPS migrations, major redesigns and URL-structure changes.
SEO migration planning focuses on preserving important signals while making the intended change.
105. Replatforming
Replatforming means moving a website from one underlying content-management or commerce platform to another.
An online store might move from a custom platform to Shopify, for example.
Replatforming often changes templates, URL behaviour, JavaScript, metadata and internal linking simultaneously, which is why SEO validation needs to begin before launch rather than after traffic changes are noticed.
Measurement, SERP Features & AI Search
The final 15 terms cover how SEO performance is measured and how search interfaces are changing.
AI-driven search has introduced new vocabulary, but many underlying requirements remain familiar. Google's current AI features documentation states that normal SEO best practices remain relevant for AI Overviews and AI Mode and that there are no additional technical requirements or special Schema.org markup needed specifically to appear in those features.
For businesses evaluating this shift, our AI Readiness services focus on the technical, content and authority foundations that help information remain understandable and discoverable across evolving search experiences.
106. Google Search Console (GSC)
Google Search Console, or GSC, is Google's platform for understanding how a verified website performs in Google Search.
It provides information about search queries, impressions, clicks, indexing, crawling, Core Web Vitals and other search-related issues.
Search Console is one of the most important first-party data sources available to an SEO team.
107. Google Analytics 4 (GA4)
Google Analytics 4, or GA4, is Google's analytics platform for measuring activity on websites and apps.
GA4 can help teams understand sessions, users, events, acquisition sources and conversions after people reach the site.
Search Console and GA4 answer different questions, so strong SEO reporting often uses both.
108. Impression
An impression generally records an instance in which a search result or eligible search feature is displayed according to the reporting platform's measurement rules.
In Search Console, impressions can help show whether Google's visibility for a site is expanding even when users do not click every result.
Interpret impressions alongside position, query type, clicks and outcomes.
109. Click-Through Rate (CTR)
Click-through rate, or CTR, is the percentage of impressions that result in clicks.
The simplified formula is:
Clicks ÷ Impressions × 100
CTR varies by ranking position, query intent, brand familiarity and SERP layout. It should not be judged against one universal benchmark for every keyword.
110. Zero-Click Search
A zero-click search is a search session in which the user does not click through to a conventional external web result.
The user may get an answer from a search feature, refine the query, abandon the search or take another action.
Zero-click behaviour makes visibility and business measurement more complex than simply counting organic sessions.
111. Featured Snippet
A featured snippet is a search feature that prominently displays information extracted from a webpage to answer a query directly.
Featured snippets can take paragraph, list, table or other formats depending on the search.
Clear, self-contained answers and well-structured pages make content easier to interpret, although no page can guarantee snippet selection.
112. People Also Ask (PAA)
People Also Ask, or PAA, is a Google search feature presenting related questions users may want to explore.
PAA questions can reveal useful subtopics and alternate wording during content research.
They are best used as evidence of related reader needs rather than a checklist of questions that must all be inserted into one article.
113. Knowledge Graph
The Knowledge Graph is Google's system for understanding entities and relationships among real-world things such as people, places, organizations and concepts.
This helps search move beyond matching strings of words.
For SEO, accurate entity information across a website and credible external sources can help reduce ambiguity about what a business or subject represents.
114. Entity
An entity is a distinct person, place, organization, product, concept or other identifiable thing that can be understood independently of one exact keyword phrase.
"Toronto" is an entity. "Google" is an entity. A particular company can be an entity.
Entity understanding helps explain why modern search is not based solely on literal keyword matching.
115. E-E-A-T
E-E-A-T stands for Experience, Expertise, Authoritativeness and Trustworthiness.
The concept comes from Google's search quality framework and is useful when evaluating whether content demonstrates credible firsthand experience, subject knowledge, reputation and trust.
E-E-A-T is not a single numerical ranking score that website owners can measure.
Google's guidance on helpful, reliable, people-first content encourages creators to focus on original value, clear sourcing, expertise and a satisfying reader experience rather than writing primarily to manipulate rankings.
116. AI Overview
An AI Overview is a Google Search feature that can provide an AI-generated overview for queries where Google's systems determine that such a response may be useful.
The response can include links to supporting websites.
AI Overviews are part of Google Search, not a separate search engine with an independent SEO submission process.
117. AI Mode
AI Mode is a Google Search experience designed for more complex, exploratory or comparative queries.
Google describes it as useful when a user wants to ask nuanced questions, conduct deeper exploration or make comparisons across information.
AI Mode may use techniques and models that differ from AI Overviews.
118. Answer Engine Optimization (AEO)
Answer Engine Optimization, or AEO, is an industry term for structuring and improving content so systems that provide direct answers can understand and potentially surface it.
There is no universal AEO standard.
In practice, many sound AEO recommendations are familiar SEO and publishing practices: answer questions clearly, publish reliable information, use understandable structure and keep important content accessible.
119. Generative Engine Optimization (GEO)
Generative Engine Optimization, or GEO, is industry terminology for attempts to improve a brand or website's visibility within generative search and AI-generated answers.
It is not a special Google setting or formal replacement for SEO.
Google currently states that there are no additional technical requirements, special AI files or special schema needed to qualify for its AI search features.
120. Query Fan-Out
Query fan-out is a technique Google says AI Overviews and AI Mode may use to issue multiple related searches across subtopics and data sources while building a response.
Instead of treating one user question as a single isolated keyword, the system can explore several related information needs.
This reinforces the value of comprehensive, well-organized subject coverage rather than pages built around one repeated phrase.
SEO Glossary FAQs
What Are the Most Important SEO Terms for Beginners?
Start with SEO, SERP, search query, search intent, keyword, crawling, indexing, ranking, title tag, internal link, backlink, canonical tag, robots.txt, Google Search Console and organic traffic.
Those terms provide enough vocabulary to understand the basic process from a user searching to a search engine discovering a page and a business measuring the resulting traffic.
What Is the Difference Between Crawling and Indexing?
Crawling is retrieval. Indexing is processing and potential storage for search.
Googlebot can crawl a URL without Google ultimately indexing it. This is why seeing crawler activity in server logs does not prove that a page is searchable.
When diagnosing visibility, check crawling, indexability and indexing separately.
Is Domain Authority a Google Ranking Metric?
No. Domain Authority is a third-party Moz metric.
Domain Rating is similarly a third-party Ahrefs metric. Google uses its own ranking systems, including evolved link-analysis systems such as PageRank, but it does not use a website's Moz DA or Ahrefs DR value as its ranking score.
What Is the Difference Between a Canonical Tag and a Redirect?
A canonical tag indicates a preferred representative URL for duplicate or closely similar content while the alternate URL can remain accessible.
A redirect sends browsers and crawlers from one URL to another.
Use the mechanism that matches the actual requirement rather than treating them as interchangeable.
Is Robots.txt the Same as Noindex?
No.
Robots.txt controls crawling access. Noindex controls indexing.
Blocking a page in robots.txt can prevent a crawler from retrieving the page and therefore prevent it from seeing page-level directives. Google's documentation treats these controls as serving different purposes.
What Is the Difference Between SEO, AEO and GEO?
SEO is the established discipline of improving search-engine accessibility, relevance and visibility.
AEO and GEO are newer industry labels describing optimization for answer systems and generative search experiences. Many underlying practices overlap with SEO, including technical accessibility, clear information architecture, credible content and authority.
Google does not require a separate GEO implementation to appear in AI Overviews or AI Mode.
Do Keywords Still Matter in SEO?
Yes, but not as a density formula.
Keyword research helps identify how people describe problems, what they want and which topics deserve separate pages. Search engines can also understand related wording and concepts, so effective SEO focuses on satisfying intent comprehensively rather than repeating exact phrases.
Are Core Web Vitals Ranking Factors?
Core Web Vitals are part of Google's broader page-experience considerations, and Google recommends achieving good Core Web Vitals for both users and Search.
They should not be treated as a standalone formula where a perfect performance score automatically produces higher rankings. Relevance, content quality and the wider search context still matter.
How to Apply These SEO Terms in Practice
Knowing SEO terminology is useful. Knowing which concepts matter to a specific website is more valuable.
When reviewing a site, work in this order:
- Confirm access. Can search engines crawl the important pages?
- Confirm indexability. Are the correct URLs eligible for indexing?
- Confirm intent. Does each important page clearly serve a worthwhile search need?
- Review architecture. Can users and crawlers reach the right pages through sensible internal links?
- Review page signals. Do titles, headings, content, canonicals and structured elements agree about what each page is?
- Review authority. Is the business earning credible links, mentions, reviews and reputation signals?
- Measure outcomes. Use Search Console, analytics and business data to understand what organic visibility actually produces.
- Prioritize by impact and risk. A widespread indexing problem usually deserves attention before rewriting a paragraph to include another keyword variation.
The same principle applies to SEO terminology itself. A useful SEO vocabulary should make decisions clearer, not make straightforward work sound more complicated than it is.
A Plain-English SEO Glossary Should Reduce Ambiguity
SEO evolves, so some terminology will continue to change. Search features appear, metrics are replaced, platforms rename products and industry labels emerge before definitions fully settle.
The durable concepts remain more stable: make important pages accessible, understand what people are trying to find, organize information clearly, publish material worth using, earn legitimate authority and measure outcomes that matter.
When terminology gets in the way of those principles, return to the underlying question: What problem are we trying to solve for the user, the search engine or the business?
For businesses that want those principles translated into a practical acquisition strategy, SEO Team Toronto's Toronto digital marketing services connect organic search with the wider work required to generate and measure qualified demand.
