What is 404 error ?

A 404 error is an HTTP status code that indicates that the server did not find the requested webpage. When you visit a website, your browser sends a request to the server for a specific page. If the server cannot locate the requested page, it responds with a 404 status code, indicating that the page is not found.

The "404" number is part of the HTTP status code system, where each status code has a specific meaning. In the case of a 404 error, it typically means that the requested URL or resource could not be found on the server. This could be due to various reasons, such as a mistyped URL, a deleted or moved page, or a broken link.

Web servers often display a standard 404 page with a message like "404 Not Found" to inform users that the requested content is unavailable. Website owners can customize these pages to provide more information or redirect users to a relevant page.