The robots.txt file at a domain’s root declares crawling rules by user agent. Excluding unnecessary areas, such as login or administration interfaces, can direct limited crawl resources toward important pages. However, a blocked URL may still appear in search results when linked from elsewhere, even without a snippet. To remove a page from indexing, allow crawling and use noindex rather than relying on a crawl block. These rules are not a substitute for access controls.
Some websites are seeing sharp increases in site: operator queries in Search Console performance reports. Explore possible causes, measurement effects and diagnostic responses.
