The 404 or Not Found error message is a HTTP standard response code, in computer network communications, to indicate that the client was able to communicate with a given server, but the server could not find what was requested.

A 404 or Not found error message displays when the server is unable to locate a page,commonly due to a dead link or incorrect url.

You've seen it. There you are, surfing in your favorite search engine when you happen upon just the thing you're looking for. Nothing but a white page with the words "404 Error" and some other techie-sounding speak beneath.

What's even more cheesy about the error code is that it really doesn't tell you what the problem is. Basically you've been informed that the server cannot find what you want. It doesn't tell you why, how to fix it, or where to go from that point. You really don't have much choice but to hit your BACK button, call the computer a dirty name, and try again.

But then you see it--a server that's set up with its own special 404 error page that politely apologizes and offers you links to e-mail site administrators and maybe a site search engine. Now that's class! So I waltzed into the office of the Webmaster at work and asked how it was done. I was stunned at how easy it is to set up.
Want one of your own? Here's how.

Error 404 are caused by requests to pages or resources that don't exist on the server.
By default a lot of the applications you might install on your website, will try to process requests for a page that doesn't exist dynamically.

The customization of 404 error pages differently. (A web server, in this context, is the software that runs on your web host's computer

Custom 404 error pages frequently demonstrate that the asked for page can't be found while giving connections back to the landing page and other prominent class pages.

This error page indicates the page is not available.

A 404 or Not found error message displays when the server is unable to locate a page,commonly due to a dead link or incorrect URL.

A 404 error message is the standard HTTP standard response code which is returned when the visitor cannot communicate with the server. the "best" 404 page would be one that matched your site so that visitors wouldn't get confused. The way to go about it can vary depending on your hosting company too.

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The 404 Hypertext Transfer Protocol (HTTP) standard response code it indicate user able to communicate with server but server not find what user requested.
Web servers can typically be configured to display a customized 404 error page, The protocol level phrase, which is hidden from the user, is rarely customized.

Custom 404 error pages often indicate that the requested page cannot be found while providing links back to the home page and other popular category pages.

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404 - If the server has not found anything matching to the requested URL.