Web maintenance is essential for this reason. It is common for owners of websites to not check their external links regularly which leads to users trying to access a dead link. Unfortunately, due to many people putting up URLS to web sites all over the place, there will ultimately be links that actually link to nowhere. This means that when someone clicks on an “old” link, they will no longer be able to find that site. Even when web owners maintain their web sites, sometimes the owner may delete the site, or change the name of the site. Unfortunately, broken links are often left for long periods of time after the page has been deleted or moved. The entered domain name does not exist anymore.Although it happens very rarely, sometimes the server malfunctions.The page was moved to another URL and the redirection was done incorrectly.One typical trigger for an error 404 message is when the page has been deleted from the website.There are several reasons why you might be getting an HTTP 404 code:
The 404 error code can appear in any browser, regardless of the type of browser you are using.
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.