It really makes users sad and sometimes even angry when the homepage of a website couldn’t be found. Visitors don’t get upset if an error page is presented in a funny, unusual or elegant manner. In such an effective way you can save your clients and they will, surely, came back to your website where the 404 page has an original design, offers the solution of what to do and provides useful information about the error.
So, don’t underestimate the importance and value of a custom error page, create a really outstanding one to point users in the right direction if the page on your website is no longer there. Let them know what’s happened and help easily understand the reason for a problem.