Indexability
Indexability is whether a search engine can add a page to its index. A page that can't be indexed can't rank, and can't be linked in Google's AI answers.
Indexability is whether a search engine is able to add a page to its index, the store of pages it searches. A page can be easy to reach and still not be indexable, because something tells the search engine to leave it out or makes it look like a copy of another page.
It matters because indexing comes first. A page that isn't in the index can't rank in search results, and Google says it can't appear as a link in its AI answers either.
What stops a page being indexed
The usual reasons are:
- A
noindextag in the page, or in the server's response - A canonical tag pointing to a different page, so Google indexes that one instead
- An error status, such as a 404 or a 500, or a redirect
- A robots.txt rule that stops the crawler reading the page at all
- Content so thin or duplicated that Google chooses not to keep it
Some of these are on purpose. Others are left over from a redesign or a plugin setting, and nobody notices until traffic drops.
Indexability and AI answers
For Google, the rule is written down. To show as a link in AI Overviews or AI Mode, a page has to be indexed and eligible to show in Search with a snippet. A nosnippet rule keeps it out too.
Other AI platforms build or borrow their own indexes. Copilot draws on Bing's, for example, so it's worth checking your important pages are indexed in Bing as well.
For example, if Fernhill Coffee's new subscription page still carries the noindex it had while in testing, Google won't show it, and Google's AI answers can't link to it, however well it's written.
In AnswerOrbit
The Audit tab in Website shows which AI bots your robots.txt lets in, and the Page tester checks a single page. In Recommendations, Page checks run eight checks on a page for a prompt, starting with whether AI crawlers may read it. See Website and AI traffic and Recommendations.