If you have checked out many Internet sites, you've probably encountered some error message from time to time. An error could occur when the web hosting server cannot process a request (Error 400), if you have to log in to see some content and you haven't done so (Error 401), if you are not allowed to access some page (Error 403) or when a link leads to a file that is not on the hosting server (Error 404). Receiving such messages could sometimes be frustrating because the pages have nothing in common with the actual site. That’s why some website hosting companies allow you to apply your own error pages that will match the design of your own website and that may have any content that you'd like - information why the error has taken place, a suggestion how to proceed or even some amusing remark. This kind of function can help you keep the visitor on the website regardless of the error or the reason for it.