Many SEO discussions revolve around rankings. Before that comes a question that is often overlooked: is the page in the index at all? A page that is not indexed does not exist for search — neither in classic results nor in AI Overviews or other AI answers built on the index.
Crawling, rendering, indexing
First the search engine discovers a URL, via links, the sitemap or a submission. Then the crawler fetches the page, provided robots.txt allows it and the crawl budget suffices. The page is then rendered, including executing JavaScript. Finally the search engine decides whether to include the page in the index and which URL counts as canonical among duplicates. Every step can fail.
The key statuses in Search Console
The page indexing report shows why URLs are not in the index. “Discovered – currently not indexed” means the URL is known but not yet crawled, often a sign of too many URLs or weak internal linking. “Crawled – currently not indexed” means Google has seen the page and decided against inclusion for now, usually because of low added value or similarity to other pages. Then there are exclusions through noindex, redirects, errors and duplicates with a different canonical.
Why pages are not indexed
Technical: noindex, blocked by robots.txt, wrong canonical, content only visible after JavaScript interaction, server errors. Content: thin pages, templates with swapped place names, duplicates, no added value over existing pages. Structural: pages without inbound internal links, too deep in the click structure or reachable only via the sitemap. For large sites using programmatic SEO, the content reason is the most common.
Improving systematically
First, only indexable, valuable URLs in the sitemap, no noindex pages and no redirects. Second, make every important page reachable through several internal links from thematically related pages, with low click depth; that is the core of internal linking. Third, merge or improve pages Google considers too similar. Fourth, resubmit the sitemap after major changes and inspect important URLs individually. For Bing and other search engines, IndexNow can report changes faster.
At Innopulse
Before delivering any larger batch of pages, we check automatically that no sitemap URL is set to noindex, every page has a correct canonical and at least two inbound internal links, and click depth stays low. The same check is part of our technical SEO audit.