The Error of 404 is probably the most common HTTP error that people encounter when they’re browsing the web. If you’ve been using the internet for over a year, chances that IT infrastructure services you haven’t encountered yet are pretty low. They’re very common. Normally, people don’t pay too much attention to them. As a user, you will get frustrated at most and hit the back button or close the tab. As a webmaster, however, more things might be at stake. Many website owners ask themselves if 404 pages can hurt their SEO and rankings in any way.