Technical
Indexation
Also known as: indexing, Google index inclusion
Indexation is the process by which search engines add discovered URLs to their searchable index. A page that's crawled isn't automatically indexed; Google decides per-URL whether the content is worth including based on quality, uniqueness, internal linking signals, and canonical status. In 2026 Google indexes substantially fewer pages than it crawls — discovery does not equal inclusion.
How indexation works
- Discovery — crawler finds the URL (via sitemap, internal link, external link)
- Crawl — crawler fetches the page content
- Rendering — JS-heavy pages get a second-wave render
- Processing — Google evaluates quality, uniqueness, canonical status
- Index decision — included, excluded, or queued for later
Each step can fail. Search Console’s Coverage report shows where pages drop off.
Common Coverage report states
| Status | Meaning |
|---|---|
| Indexed, submitted in sitemap | Working as expected |
| Indexed, not submitted in sitemap | Found via links, sitemap missing |
| Excluded by ‘noindex’ tag | You asked Google not to index |
| Crawled — currently not indexed | Quality threshold not met (common in 2024-2026) |
| Discovered — currently not indexed | Crawl budget didn’t get there |
| Duplicate, Google chose different canonical | Your canonical hint was overridden |
| Alternate page with proper canonical | Self-explanatory |
| Soft 404 | Page returned 200 but content looks like an error |
What causes pages to be crawled but not indexed
- Thin content / low quality
- Near-duplicate of other pages
- Conflicting signals (canonical, hreflang, redirects)
- Spammy or boilerplate content
- Helpful Content Update flagged
- Site-wide quality issues affecting individual pages
Recovery
If specific pages aren’t indexed:
- Manually request indexing via GSC URL Inspection (limited daily quota)
- Improve internal linking to those pages
- Add unique data/insights to thin pages
- Verify canonical signals are consistent
- Submit a fresh sitemap
If sitewide indexation is dropping, that’s usually a Helpful Content / quality signal — content audit is the answer, not technical fixes.
Related terms
Apply in practice
- Resocial service →
/services/seo/technical-seo/ - Read on the blog →
/blog/technical-seo-vs-on-page-seo/