HTTP Response Status Codes: What They Mean and Why They Matter

HTTP response status codes are an essential part of this communication. They are three-digit codes sent by the web server to indicate the status of a client’s request. These codes are grouped into five categories, each with its unique meaning.


A 404 error is a status code that indicates to a user of a website that the requested page is not available. This error code, along with other response status codes, is a part of the Hypertext Transfer Protocol (HTTP) response codes of the web.