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## 404 NOT FOUND! Sorry, the article you are looking for was not found!! The 404 page is an essential page for any website, carrying the important responsibilities of user experience and SEO optimization. A 404 page typically appears when a user visits a page that does not exist or has been deleted on the website, and the server returns a 404 error. If the webmaster does not set up a 404 page, dead links will occur, and when spiders crawl such URLs, it is not conducive to search engine indexing. ## Origin of 404 Not Found It is said that before the Third Industrial Revolution, the internet existed as a large central database located in room 404. At that time, all requests were completed manually. If the requested file was not found in the database, or if the requester wrote the wrong file number, the user would receive a return message: room 404 : file not found. Later, as the internet rose in popularity, people became accustomed to using 404 as the error code for when the server could not find a file. Of course, according to actual research, the legendary room 404 did not exist. ## Two Major Benefits of Setting Up a 404 Page * Guide users not to close the website, enhancing user experience. * Prevent the website from having dead links. View More