A status code 404, also written as "404 Not Found", is an error message you'll encounter when browsing the web. It indicates that the server you contacted received your request for a specific web page, but it couldn't find that page on its system. There are a couple of reasons why this might happen:
In any case, the server doesn't have what you're looking for, and it lets you know with a 404 error message. These error messages can sometimes be customized by the website you're visiting, so you might see a variety of creative "404 Not Found" pages.