Some websites report a “not found” or 404 error when users visit the page. This is because the server could not find what was requested. This is possible when a user attempts to follow a broken or dead link. When a user or search engine gets on to such a page with an irrelevant link, web servers show an HTTP status code of 404 to tell the user that the page doesn’t exist on the server. This is one of the most common errors found on the web, which creates a negative user experience and also have a negative impact on search engines.