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web
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What is HTTP Status Codes?
Definition
HTTP status codes are three-digit numbers returned by servers to indicate the result of a request. They are grouped: 2xx (success), 3xx (redirect), 4xx (client error), and 5xx (server error). Common codes include 200 OK, 301 Redirect, 404 Not Found, and 500 Internal Server Error.
Why It Matters
Status codes are the language of web communication. They tell clients (and search engines) whether a request succeeded, where to redirect, or what went wrong. Correct status codes improve SEO (301 vs 302 redirects), debugging, and API design.