What does a 404 error indicate?

A 404 error specifically indicates that the requested resource could not be found on the server. This means that when a user attempts to access a webpage or resource using a specific URL, the server is unable to locate the appropriate content associated with that URL. The reasons for a 404 error can vary; it could be due to the page being moved, deleted, or the URL being typed incorrectly.

Understanding this error is crucial for web developers and website administrators, as it impacts user experience and could lead to frustration if users cannot find the content they are looking for. Correcting a 404 error often involves checking the server's file structure, ensuring that links are up-to-date, and possibly implementing redirects for moved content to maintain accessibility for users.