The Index Coverage report groups URLs into four states — Error, Valid with warnings, Valid, and Excluded — each with detailed reasons such as "crawled - currently not indexed" or "duplicate without user-selected canonical".
Why it matters
A URL that is not indexed cannot rank. Chronic exclusion reasons usually reveal deeper issues: thin content, duplicate pages, incorrect canonicals, or noindex tags applied by mistake.
Example
A publisher notices 4,000 URLs stuck in "Discovered - currently not indexed". The cause is thin author-archive pages that Google chose to skip.
How SEM Optimiser reports it
Index coverage data is imported from Search Console and joined with crawl data so any URL flagged by Google can be inspected alongside its on-page signals in one view.
Related terms
- Crawl Budget
Crawl budget is the number of URLs Googlebot can and will crawl on a website within a given time frame, determined by crawl capacity and crawl demand.
- Canonical Tag
A canonical tag is a link element that tells search engines which URL is the preferred version when the same or similar content appears at multiple URLs.
- XML Sitemap
An XML sitemap is a file that lists a website's important URLs to help search engines discover and crawl them efficiently.
- GSC (Google Search Console)
Google Search Console is a free tool from Google that reports how a site appears in Google Search, including impressions, clicks, position, and indexing state.