A–Z SEO Glossary 🧠
My complete guide to all the search engine optimization terms you need to know, from A to Z.
🅰️ A – SEO Terms
- A/B Testing
- Comparing two versions of a page to see which performs better.
- ALT Text
- Descriptive text for images that helps search engines and improves accessibility.
- Anchor Text
- The clickable text of a hyperlink.
- Algorithm
- The formula search engines use to rank pages.
- Analytics
- Data measurement of website traffic and behavior (e.g., Google Analytics).
- Authority
- A site’s trust level and credibility in search engines.
🅱️ B – SEO Terms
- Backlink
- A link from another website pointing to your site.
- Bounce Rate
- The percentage of visitors leaving after viewing only one page.
- Black Hat SEO
- Unethical tactics that violate search engine guidelines.
- Breadcrumbs
- Navigation links showing the user’s location on a site.
- Bot / Crawler
- Automated programs that scan and index web pages.
🅲 C – SEO Terms
- Canonical URL
- The preferred version of duplicate or similar pages.
- Click-Through Rate (CTR)
- The ratio of users who click on a link versus those who see it.
- Content Marketing
- Creating valuable content to attract and engage users.
- Conversion Rate
- Percentage of users completing a desired action.
- Core Web Vitals
- Google’s metrics for page loading, interactivity, and visual stability.
- Crawl Budget
- The number of pages a search engine will crawl on your site.
🅳 D – SEO Terms
- DA (Domain Authority)
- A metric predicting how well a site ranks.
- De-Indexing
- When a page is removed from search results.
- Disavow Tool
- Used to tell Google to ignore certain backlinks.
- Dofollow / Nofollow Links
- Indicates whether a link passes ranking value.
- Duplicate Content
- Identical or near-identical content on multiple URLs.
🅴 E – SEO Terms
- E-E-A-T
- Experience, Expertise, Authoritativeness, and Trustworthiness (Google’s quality standard).
- External Link
- A link pointing to another website.
- Engagement Metrics
- User interaction data like clicks, shares, and time on page.
- Evergreen Content
- Content that stays relevant over time.
🅵 F – SEO Terms
- Featured Snippet
- A short highlighted answer at the top of Google results.
- Fetch as Google
- A tool (in Search Console) to test how Google views your page.
- Follow Link
- A link that passes SEO value.
- Freshness
- How recently content was updated or published.
🅶 G – SEO Terms
- Googlebot
- Google’s web crawler.
- Google Business Profile (GBP)
- Google’s local listing tool.
- Google Search Console
- A free tool for monitoring site performance and visibility.
- Guest Posting
- Publishing articles on other sites to build backlinks.
🅷 H – SEO Terms
- Header Tags (H1–H6)
- HTML tags that structure content by importance.
- Headline Optimization
- Improving titles for SEO and click appeal.
- Hidden Text
- Text not visible to users but readable by crawlers (avoid—black hat).
- HTML Sitemap
- A page listing all site URLs for users and crawlers.
🅸 I – SEO Terms
- Impressions
- How many times your page appeared in search results.
- Index
- The database where search engines store web pages.
- Internal Link
- A link between two pages on the same website.
- Image Optimization
- Compressing and labeling images for SEO.
- Intent (Search Intent)
- The user’s purpose behind a search query.
🅹 J – SEO Terms
- JavaScript SEO
- Optimizing sites that use JavaScript-heavy frameworks.
- JSON-LD
- A format for adding structured data markup.
🅺 K – SEO Terms
- Keyword
- A word or phrase users search for.
- Keyword Density
- How often a keyword appears on a page.
- Keyword Research
- Finding search terms that attract the right audience.
- Knowledge Graph
- Google’s information box summarizing key facts.
🅻 L – SEO Terms
- Landing Page
- A standalone page for a specific campaign or offer.
- Latent Semantic Indexing (LSI)
- Related keywords used to understand topic context.
- Link Building
- Acquiring backlinks from other websites.
- Local SEO
- Optimizing for location-based searches.
- Long-Tail Keyword
- A longer, more specific search phrase.
🅼 M – SEO Terms
- Meta Description
- The summary that appears under a page title in search results.
- Meta Tags
- HTML tags describing a page’s content.
- Mobile Optimization
- Making sites responsive for mobile devices.
- Manual Action
- A Google penalty for violating guidelines.
- Metadata
- Information about a web page for search engines.
🅽 N – SEO Terms
- Natural Links
- Links earned organically, not bought or traded.
- Negative SEO
- Malicious tactics to harm a competitor’s rankings.
- Noindex Tag
- Prevents a page from appearing in search results.
- Niche
- A specialized segment or topic area.
🅾️ O – SEO Terms
- Off-Page SEO
- Actions taken outside your website to improve rankings.
- On-Page SEO
- Optimization done directly on your site.
- Organic Traffic
- Visitors coming from unpaid search results.
- Outbound Link
- A link from your site to another site.
🅿️ P – SEO Terms
- Page Authority (PA)
- Ranking strength of an individual page.
- Page Speed
- How fast a page loads.
- PPC (Pay-Per-Click)
- Paid advertising model on search engines.
- Pillar Page
- A comprehensive page that links to detailed cluster content.
- Plugin (SEO Plugin)
- A tool that adds SEO features to websites (e.g., Yoast).
🆀 Q – SEO Terms
- Query
- The keyword or phrase entered into a search engine.
- Quality Content
- Useful, relevant, and authoritative information for users.
🆁 R – SEO Terms
- Ranking Factors
- Criteria search engines use to rank pages.
- Redirect (301 / 302)
- A way to forward visitors from one URL to another.
- Robots.txt
- A file telling crawlers which pages to visit or avoid.
- ROI (Return on Investment)
- Measuring SEO performance value.
- Rich Snippet
- Enhanced search result showing reviews, prices, etc.
🆂 S – SEO Terms
- Schema Markup
- Code that helps search engines understand page content.
- Search Engine Results Page (SERP)
- The list of search results.
- Search Intent
- The goal behind a search query.
- Sitemap.xml
- A file listing site URLs for search engines.
- Slug
- The part of a URL after the domain name.
- Spam Score
- A metric estimating how “spammy” a site might appear.
🆃 T – SEO Terms
- Technical SEO
- Site structure and crawlability optimization.
- Title Tag
- The clickable title in search results.
- Thin Content
- Pages with little or no value to users.
- Traffic
- Visitors to a website.
- Trust Flow
- A metric showing link quality and trustworthiness.
🆄 U – SEO Terms
- URL (Uniform Resource Locator)
- The address of a web page.
- User Experience (UX)
- How easy and enjoyable a site is to use.
- User-Generated Content (UGC)
- Content created by users, like reviews or comments.
🆅 V – SEO Terms
- Voice Search
- Searching by speaking instead of typing.
- Visibility
- How often and where a page appears in search results.
🆆 W – SEO Terms
- Web Crawler
- Automated program indexing websites.
- White Hat SEO
- Ethical, guideline-compliant SEO practices.
- Word Count
- Total number of words on a page; can affect depth and ranking.
- Web Vitals
- Core web performance metrics from Google.
🆇 X – SEO Terms
- XML Sitemap
- A structured list of site pages for search engine bots.
- X-Robots-Tag
- HTTP header used to control indexing.
🆈 Y – SEO Terms
- Yahoo / Yandex
- Alternative search engines.
- YouTube SEO
- Optimizing videos for YouTube’s search algorithm.
🆉 Z – SEO Terms
- Zero-Click Search
- When users get answers directly on SERPs without clicking.
- Zone File
- DNS file that maps domain names to IP addresses (technical SEO).