A HTTP status codes are server responses sent to a browser’s request, indicating success, redirection, client errors, or server issues.
These numeric codes are part of the response header from a web server, helping browsers and users understand how a request was processed. Each status code falls into one of five categories:
Categories of HTTP Status Codes:
- 1xx (Informational): Request received, continuing process.
- 2xx (Success): The request was successfully received and processed.
- Example: 200 OK – the request succeeded.
- 3xx (Redirection): Further action needs to be taken.
- Example: 301 Moved Permanently – the resource has moved to a new URL.
- 4xx (Client Errors): The request contains bad syntax or cannot be fulfilled.
- Example: 404 Not Found – the server can’t find the requested page.
- 5xx (Server Errors): The server failed to fulfill a valid request.
- Example: 500 Internal Server Error – generic server failure.
Why It Matters in SEO:
Search engines rely on HTTP status codes to crawl and index content properly. Persistent 4xx or 5xx errors can lead to deindexing or reduced rankings. Redirects (301/302) must be handled carefully to maintain link equity and user experience.
Best Practices:
- Regularly monitor for broken links (404 errors).
- Use 301 redirects when moving or deleting pages.
- Avoid excessive or chained redirects.
- Ensure error pages offer helpful navigation or search features.
