Indexability matters because being indexed is the prerequisite for appearing anywhere. If your page is not in the index, it cannot rank, and it cannot be pulled into an AI-generated answer. Common blockers include noindex meta tags, canonicalization that consolidates a page into another URL, and content engines judge as low value.
Indexability follows crawlability in the discovery chain: first a page must be readable, then it must qualify to be stored. Auditing both is essential. Learn more in the SEO audit guide. Back to the SEO & AEO glossary.
FAQ
Why would a crawlable page not be indexed?
Several reasons: a noindex tag telling engines to skip it, a canonical tag pointing to a different preferred URL, near-duplicate content, or quality signals the engine considers too thin. Being fetched by a bot does not guarantee a place in the index.
How do I check if a page is indexable?
Look for noindex directives in the meta robots tag and HTTP headers, confirm the canonical tag points to the page itself, and check for duplicate content. An SEO audit that flags these issues across your site is the quickest way to find pages silently excluded from search.
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