Knowledge hub
The SEO and AI reference library
Verified reference data for SEO, AEO and GEO: every AI crawler, Google’s update history, structured data status, robots directives, HTTP status codes and webmaster tools — all linked to official sources.
Reference tables
AI crawler list
All 29 officially documented AI crawlers and fetchers — OpenAI, Anthropic, Google, Perplexity, Apple, Meta, Amazon, Mistral and more — with purpose, robots.txt support and official docs.
Google update history
Every confirmed Google ranking update from 2022 to 2026 — core, spam, helpful content and reviews updates — with dates and links to Google’s Search Status Dashboard.
Schema & rich result status
A current list of Google rich result types: which schema.org markup is supported, limited or deprecated (including FAQ, HowTo and the 2025 removals), with links to the official docs.
Robots directives
What noindex, nofollow, nosnippet, max-snippet, data-nosnippet, unavailable_after, Disallow, Crawl-delay and other robots directives do, and which search engines support them.
HTTP status codes
How Google handles 200, 301, 302, 307, 308, 404, 410, 429, 500 and 503 responses — which pass signals, which drop pages and which slow crawling.
Webmaster tools by engine
Where to verify your site for each search engine — Google Search Console, Bing Webmaster Tools, Yandex, Naver, Baidu, Seznam — and which engines support IndexNow.
Guides
What is SEO? A practical guide to Search Engine Optimization
7 min read
What is AEO? A guide to Answer Engine Optimization
6 min read
What is GEO? A guide to Generative Engine Optimization
8 min read
Glossary
Key terms in one sentence each
FAQ
Short answers to common questions
Tools directory
Every SEO and AI tool, verified