01
What an HTTP status code tells you
Every page request receives a response code that describes what happened between the browser or crawler and the server. Those codes help diagnose whether content loaded successfully, moved somewhere else, could not be found or failed at the server level.
Search engines rely on the same responses when crawling and indexing websites.
02
The status-code families that matter
2xx responses indicate success, 3xx responses indicate redirection, 4xx responses describe client-side or missing-resource problems and 5xx responses indicate server failures. Each family has different implications for users and search crawlers.
A healthy site will use several of these intentionally, not simply return 200 for every URL.
03
How status codes affect SEO
Incorrect redirects can dilute signals, broken internal links waste crawl attention and persistent server errors can prevent important pages from being indexed. Soft 404s are another common problem when a missing page returns a successful 200 response.
Use the correct response for the real state of the URL.
04
Monitor before errors become patterns
Crawl the site regularly, review Search Console indexing reports and monitor server logs or uptime where appropriate. Large migrations, CMS changes and URL restructuring deserve additional checks because they can create errors at scale.
Fix high-value internal links and important indexed URLs first.
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