SEO comes with its own dense vocabulary, and it's easy to nod along in a conversation without being entirely sure what a term actually means. Here's a practical glossary covering the terms that come up most often.
Fundamentals
SERP (Search Engine Results Page): The page displayed after a search query, containing organic results, ads, and increasingly, AI-generated summaries and other enhanced features.
Organic search: Unpaid search results earned through relevance and authority, as opposed to paid advertising placements.
Search intent: The underlying goal behind a search query — informational, navigational, commercial, or transactional.
Crawling: The process by which search engines discover pages by following links across the web.
Indexing: The process of storing and organizing discovered pages so they can be retrieved in response to relevant search queries.
On-Page Terms
Title tag: The clickable headline shown in search results and browser tabs, defined in a page's HTML.
Meta description: A short summary shown beneath a title in search results, meant to encourage clicks rather than directly influence rankings.
Header tags (H1, H2, etc.): HTML elements used to structure content hierarchically, helping both readers and search engines understand a page's organization.
Alt text: A text description of an image, used for accessibility and helping search engines understand image content.
Canonical tag: An HTML element indicating the preferred version of a page when duplicate or very similar content exists at multiple URLs.
Off-Page Terms
Backlink: A link from one website to another, treated by search engines as a signal of trust or relevance.
Anchor text: The clickable text of a hyperlink, which provides context about the linked page's content.
Domain authority: A metric (varying by provider) estimating a domain's overall likelihood of ranking well, based largely on its backlink profile.
Referring domain: A unique website linking to your site, as distinct from the total number of individual backlinks (a single domain can link multiple times).
Technical Terms
Core Web Vitals: A set of specific metrics measuring page loading performance, interactivity, and visual stability, used as a page experience signal.
Structured data / schema markup: Code added to a page that helps search engines understand specific types of content (products, reviews, events, and more), often enabling enhanced search result features.
XML sitemap: A file listing a site's important pages, submitted to help search engines discover and prioritize content efficiently.
Robots.txt: A file that gives instructions to crawlers about which parts of a site should or shouldn't be crawled.
Mobile-first indexing: The practice of primarily using a site's mobile version for indexing and ranking, reflecting the majority of search traffic now originating from mobile devices.
Strategy Terms
E-E-A-T: Experience, Expertise, Authoritativeness, and Trust — a framework describing the quality signals search engines aim to identify in content and its creators.
Keyword cannibalization: When multiple pages on the same site compete for the same keyword or intent, diluting rankings for all of them.
Topic cluster: A content structure organizing a comprehensive pillar page alongside related, interlinked subtopic articles to demonstrate topical authority.
Manual action: A penalty applied directly by a search engine's team in response to a violation of guidelines, as opposed to an algorithmic ranking adjustment.
Put these terms into practice. As you work through concepts like backlink quality, structured data, or keyword cannibalization, SeoWolf's SEO Audit and Meta Tags Analyzer let you see exactly how these elements show up on your own site.