Creating a unique 404 page gives your business a chance to showcase its brand identity.
A uniquely designed and interactive 404 page shows the brand's quality. If the webmaster has put an effort into taking care of the error page, you can probably expect an extraordinary experience from the functioning part of the web page. Interacting with a visitor on the 404-page level is a way to admit that something has failed but not to let the visitor go and to show that you care.