Every website should have a 404 error page to be displayed in case that the client is looking for a page which is inexistent. For the ones who don`t know yet,the 404 or Not Found error message is a HTTP standard response code indicating that the client was able to communicate with the server, but the server could not find what was requested.
In other words, if you type in a bad address of a website, for example www.wufoo.com/blablabla/ , you`ll get the message: “404! wufoo couldn`t find it! This file may have been moved or deleted.Be sure to check your spelling!”
If you don`t have a 404 error page yet, take a look at this examples below and create your unique 404 error page!