The web page is either broken, or it no longer exists. When an HTTP 404 appears on your screen, it means that although the server is reachable, the specific page you are looking for is not. We will use some CSS as well to further enhance the page. In this tutorial, we will build an HTML 404 error web page to customize what the visitor sees when they land there. In other words, your web browser can connect with the server, but the specific page you are trying to access cannot be reached. One of these is known as a 404! error. Quite simply an HTML 404! error message is a Hypertext Transfer Protocol (HTTP) status code indicating the server could not find the requested website.
There can be many reasons a user cannot gain access to a website.
