# Google Official SEO Documentation Summary

Quick reference from Google Search Central.

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## Search Three-Stage Process

| Stage | Description | Focus |
|-------|-------------|-------|
| **Crawling** | Googlebot discovers pages | robots.txt, sitemap, links |
| **Indexing** | Content analyzed and stored | Quality, canonical, noindex |
| **Serving** | Results returned | Relevance, E-E-A-T, UX |

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## Core Web Vitals

| Metric | Good | Needs Work | Poor |
|--------|------|------------|------|
| **LCP** | < 2.5s | 2.5-4s | > 4s |
| **FID** | < 100ms | 100-300ms | > 300ms |
| **CLS** | < 0.1 | 0.1-0.25 | > 0.25 |

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## Structured Data Types

| Type | Use Case | Rich Result |
|------|----------|-------------|
| FAQPage | FAQ content | Expandable Q&A |
| Article | Blog/news | Title + date |
| Product | E-commerce | Price + rating |
| HowTo | Tutorials | Steps |
| VideoObject | Video | Thumbnail |
| BreadcrumbList | Navigation | Breadcrumbs |

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## Spam Policies (Avoid)

- Keyword stuffing
- Hidden text/links
- Link schemes
- Auto-generated content
- Scraped content
- Cloaking

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## Official Tools

| Tool | URL |
|------|-----|
| Search Console | search.google.com/search-console |
| Rich Results Test | search.google.com/test/rich-results |
| PageSpeed Insights | pagespeed.web.dev |
| Mobile-Friendly Test | search.google.com/test/mobile-friendly |

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## Reference

- https://developers.google.com/search
- https://developers.google.com/search/docs/fundamentals/seo-starter-guide
