Mostly some of unknown users type or search those file which is not in your site then only this type the 404 page error display and another condition its appear when your website any page link will be broken. Creating a error 404 page instead of showing a highly unpleasant error page might attract random visitor stay longer on your website. So stop underestimating Error 404 page not found and leads it can create to increase visitors to your website. Look through these creative and inspirational showcase of 20 Error 404 pages to inspire you. Adding a navigation or search box, humours image, slogan, mixing color are also good strategy to use on a 404 page. So, stop thinking and use your mind and creativity to start designing your own 404 page.