justyourseoSEO Reference
Cheat sheets and lookup tables for the SEO details you check every week.
- Meta tags cheat sheetWhich meta tags Google uses and which it ignores
- Robots meta directivesnoindex, nosnippet, max-snippet and X-Robots-Tag
- Schema types for rich resultsGoogle's rich result types and their required properties
- HTTP status codes for SEOHow Google treats 2xx, 3xx, 4xx and 5xx responses
- AI crawler user agentsGPTBot, ClaudeBot, Google-Extended and other AI bots
- Hreflang codesLanguage and region codes for hreflang, and common mistakes
- SEO glossary71 SEO terms explained in plain English
About these references
Each page is a fast table you can scan or filter: which meta tags Google uses and which it ignores, every robots meta rule, the schema.org types that can still earn rich results, how Google treats each HTTP status code, the AI crawler tokens operators publish, hreflang language and region codes, and a plain-English SEO glossary. Content follows primary sources (Google Search Central, RFC 9309, schema.org, ISO code lists and each crawler operator's own documentation) and links to the tool that does the job.
Looking for a tool rather than a table? The SEO tools preview, generate and check your tags and files, all in your browser.