What is indexation?
Indexation is the process by which a search engine analyzes a discovered page and stores it in its index, which is the step that makes the page eligible to appear in search results at all.
Where indexation sits in the pipeline
Search works in stages: an engine crawls to discover a URL, indexes it by analyzing and storing the content, then ranks indexed pages for relevant queries. Indexation is the middle stage, and a page that is not indexed cannot rank, no matter how good it is.
Discovery does not guarantee indexation. An engine may crawl a page and still decide not to keep it, often because the content is thin, duplicative, or judged low value.
What prevents a page from being indexed
Common blockers include a noindex tag, a canonical tag pointing elsewhere, a robots rule that stops crawling, or duplicate content that the engine folds into another URL. Sometimes the engine simply chooses not to index a page it considers not worth storing.
At scale, quality is the frequent culprit. Large sets of near-duplicate or thin programmatic pages often get crawled but left out of the index, which is why unique value on every URL matters so much.
How to check and improve indexation
Use Search Console's page indexing report and the URL Inspection tool to see which pages are indexed and why others are excluded. The excluded reasons tell you whether the issue is a directive, a duplication problem, or a quality judgment.
Improve indexation by strengthening thin pages, resolving duplication with clean canonicals, providing a current sitemap, and building internal links so important pages are easy to discover and clearly worth storing.
Frequently asked questions
What is the difference between crawling and indexing?
Crawling is when an engine discovers and fetches a page. Indexing is when it analyzes that page and stores it in the index. A page can be crawled but not indexed if the engine decides it is not worth keeping.
Why is my page crawled but not indexed?
Usually because the engine judged the content thin, duplicative, or low value, or because a directive like noindex or a canonical pointing elsewhere excluded it. Improving uniqueness and internal links often helps.
Keep reading
Want this machine pointed at your site?
This page is one of a swarm we generated for ourselves. We build the same for you.
Get Started - $10,000