SEO glossary
Every SEO term, in plain English
134 definitions with real examples. No jargon walls, no circular definitions that assume you already know the answer.
Start here
The terms that
actually change your score
Head terms that map onto the audit itself — crawl, on-page, Core Web Vitals, structured data and AI search.
- Core Web Vitals (CWV)
- LCP (Largest Contentful Paint)
- CLS (Cumulative Layout Shift)
- INP (Interaction to Next Paint)
- TTFB (Time to First Byte)
- Page Speed
- Crawl Budget
- Robots.txt
- XML Sitemap
- Hreflang Tags
- 301 vs 302 Redirect
- 404 Error
- Googlebot
- JavaScript SEO
- SSL Certificate
- Mobile Redirect
- Image Optimization
- WebP
- Brotli Compression
- Render-Blocking Resources
- Lazy Loading
- Meta Description
- Title Tag
- H1 Tag
- Heading Hierarchy
- Alt Text (Alternative Text)
- Canonical Tag
- Schema Markup
- Structured Data (Schema Markup)
- Noindex
- Internal Linking
- Open Graph Tags
- Anchor Text
- Search Engine Optimization (SEO)
- SERP (Search Engine Results Page)
- Search Intent
- Featured Snippet
- E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness)
- Duplicate Content
- Answer Engine
- GEO (Generative Engine Optimization)
- LLM Optimization
- AI Overview (Google SGE)
- Zero-Click Search
- Entity SEO
- Knowledge Graph
- SPA SEO
- HTTPS Migration
- Subdomain vs Subdirectory
- Internal Search SEO
- Manual Action
- gTLD (Generic Top-Level Domain)
- IP Delivery
- AVIF
- Image CDN
- Bundle Optimization
- Preload
- Prefetch
- Image Schema
- Video Rich Results
- Review Snippet
- Social Media Schema
- Local Schema
- Coupon Schema
- ARIA
- Tab Order
- Skip Navigation
- Dynamic Meta Tags
- Keyword Density
- Language Tag
- RTL SEO
- International Keyword Research
- NLP (Natural Language Processing)
- Voice Search
- Mobile Interstitial
- Thumb Zone
- Impressions
- UTM Parameters
- Third-Party Cookies
AI & Modern SEO
4 termsAI Search
4 termsAnalytics
6 termsContent Marketing
14 termsCore SEO
11 termsCrawl & Indexation
6 termsE-commerce SEO
3 termsInternational SEO
5 termsLink Building
7 termsLocal SEO
6 termsOn-Page SEO
15 termsPerformance
4 termsSecurity
1 termsStructured Data
8 termsTechnical SEO
22 terms- 301 Redirect
- CLS (Cumulative Layout Shift)
- Core Web Vitals (CWV)
- Crawl Budget
- gTLD (Generic Top-Level Domain)
- HSTS (HTTP Strict Transport Security)
- HTTPS (SSL/TLS)
- HTTPS Migration
- INP (Interaction to Next Paint)
- IP Delivery
- JavaScript SEO
- JSON-LD
- LCP (Largest Contentful Paint)
- Manual Action
- Robots.txt
- Security Headers
- Sitemap
- SPA SEO
- Structured Data (Schema Markup)
- Subdomain vs Subdirectory
- Technical SEO
- XML Sitemap
Web Accessibility
4 terms134
Terms defined
Each with an example
18
Categories
Technical to local
0
Circular definitions
No “see: SEO” dead ends
Definitions are the easy part
Knowing the term
doesn't fix the site
Run the audit and see which of these actually apply to your pages — with the change to make for each one.
Know the terms.
Now fix the site.
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