what is 404 error page

404 error page in my website:

404 Error Page

A 404 error page means that, a page which has resides on the server and whenever you are trying to access any website's content is not found on that website or by other bad traffic its not accessible by users. In this case, the developers are using the 404 error page in their website for by default access their website's pages in the bad conditions.

A 404 error page is explain the website's physical health, that website which are not accessible at this time by visitor or customer. This 404 error page is created by server.