Custom 404 Error Pages and Site Usability
The most common reasons that a server will return a 404 error page are:
- Incorrect URL (or an out-of-date bookmark/favorite)
- Search engine link that points to web document on the old site
- Internal broken link that the webmaster hasn’t noticed
Most 404 custom error messages tend to be generic, and not particularly user-friendly, so making custom messages for a site is highly recommended. We recommend you create a custom 404 error page with the same look and feel as your current website.