Have you ever noticed that you clicked a link and you saw a notice that is, \”oops error 404 page not found\”. What you will do when you saw this notice. Obviously you will click back and will grow a negative mindset to that website. May be you never want to come back to that website. Think about your website. A post or link which you have deleted or reverted to draft but it is indexed by google and appearing in search results, will create this problem. In this article I will explain you that what is custom 404 error page, how it can affect badly on your website and on your visitors. Lastly I will also explain you how to overcome this problem.