File not found, an error your web browser flags. A 404 error message can be the fault of the user (if they mistyped the URL, for example) or the publisher of the website. This can happen when a web page has been deleted and no longer exists, which is also called a broken link. To prevent these errors, create a redirect to take the user to the new location of the page. Setting up a standardized error 404 page for your domain can help improve your users’ experience, especially if you provide a search bar or list of similar content.