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Definition

HTTP status code

An HTTP status code is the three-digit number a server sends with every response to say what happened to the request. The first digit groups it: 2xx is success, 3xx is a redirect, 4xx is a client error, and 5xx is a server error.

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Related terms

Redirect

A response that sends a request from one URL to another.

404 error

A status code meaning the requested page could not be found.

Soft 404

A missing page that returns 200 OK instead of a real 404 status.

TTFB

Time to First Byte: how long until the first byte of a response arrives.

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