Learn how HTTP status codes tell browsers and search engine crawlers what happened when they requested a URL.
Important codes include:
- 200 – OK
- 301 – Permanent Redirect
- 302 – Temporary Redirect
- 404 – Not Found
- 410 – Gone
- 500 – Internal Server Error
- 503 – Service Unavailable
Understanding status codes is essential when diagnosing crawling and indexing issues.