If a certain page on a website does not load for some reason or if a link is not functioning, the site visitor will see an error page with some generic message. The page shall have nothing in common with the rest of the Internet site, which may make the visitor leave the site. A potential solution in cases like this is a function offered by some web hosting providers - the option to set your own personalized error pages that shall have exactly the same design as your Internet site and that can contain any images or text that you'd like depending on the specific error. There are four popular errors that could take place and they involve these so-called HTTP status codes - 400, when your browser sends a bad request to the web server and it cannot be processed; 401, in case you are supposed to log in to see some page, but you haven't done so yet; 403, if you don't have a permission to view a particular page; and 404, if a link which you've clicked leads to a file which doesn't exist. In any of these cases, visitors shall be able to see your custom content as opposed to a generic error page.