Index Coverage.
Learn what Index Coverage means in modern search and SEO.
The Google Search Console report showing which pages on a site are indexed by Google and which are excluded, with reasons for exclusion.
The Index Coverage report in Google Search Console categorises every URL Google has encountered on a site into four statuses: Valid (indexed), Valid with Warning (indexed but with potential issues), Excluded (not indexed, for various reasons), and Error (Google tried to index but encountered a problem preventing indexing).
Common Exclusion Reasons
Key exclusion reasons include: Crawled: currently not indexed (Google discovered but chose not to index), Noindex (the page carries a noindex directive), Canonical: alternate selected (Google chose a different URL as the canonical), Page with redirect (the URL redirects to another), and Not found (404 error). Each reason requires a different investigation and remediation approach.
Using Index Coverage for Auditing
Comparing the total indexed URL count against the expected number of indexable pages reveals over-indexing (tag pages, faceted navigation variants, or parameters consuming crawl budget) or under-indexing (important pages inadvertently excluded by misconfigured robots.txt, noindex tags, or canonicals). Index Coverage is the starting point for any technical SEO audit.
Articles about Index Coverage
Read more on the Aergos blog.
Google Search Ranking Volatility Spikes Again Around October 27th
Barry Schwartz at Search Engine Roundtable flagged a new spike in Google Search ranking volatility on October 27, 2026, less than a week after reporting a separate unconfirmed update on October 24th. Tracking tools are running hot and SEO community chatter is loud. Google has not confirmed anything.
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Ahrefs Alternatives: 7 SEO Platforms Compared for Agencies (2026)
Ahrefs is one of the most respected tools in SEO, but it isn't the right fit for every agency or budget. Here's an honest comparison of seven alternatives worth evaluating in 2026, including who each one actually serves best.
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Google Reverting to Old Domain 4 Months After Migration: What's Going On?
A site owner completed a domain migration in early 2026, confirmed new-domain indexing, and watched traffic recover. Then four months later, Google flipped back to the old domain entirely. Barry Schwartz flagged the thread, John Mueller responded, and SEO experts Marie Haynes and Glenn Gabe say they're seeing the same pattern.
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How to Build an SEO Content Calendar That Actually Gets Followed
Most SEO content calendars die in a spreadsheet after week three. Here is how to build one around keyword clusters, business goals, and a workflow your team will actually stick to.
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What Is Crawl Budget and Does It Actually Affect Your SEO?
Crawl budget sounds like SEO jargon, but on larger sites it can quietly determine which pages get indexed and which ones get ignored. Here's what it actually means and when you should care.
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The Honest Truth About How Long SEO Results Actually Take
Everyone wants to know how long SEO takes. The honest answer is: it depends, but not in a vague, hand-wavy way. There are real patterns by site type, competition level, and domain history that tell you what to expect and when to worry.
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