If a specific page on a website does not load for some reason or if a link is not working, the website visitor shall see an error page with some generic message. The page shall have nothing in common with the rest of the website, that could make the visitor leave your site. A possible solution in this case is a function made available from some website hosting providers - the option to set your own customized error pages which will have the same layout as your site and which can contain any text or images you want based on the specific error. There are 4 common errors which may take place and they involve these so-called HTTP status codes - 400, when your world-wide web browser sends a bad request to the server and it can't be processed; 401, if you're supposed to log in to see a webpage, but you haven't done so yet; 403, if you do not have a permission to view a particular page; and 404, if a link which you have clicked leads to a file which does not exist. In each of these scenarios, site visitors shall be able to see your personalized content rather than a generic error page.