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📅 2026-06-14 | 📂 HTML
Page Not Found | Rookie Tutorial

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404 NOT FOUND!

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The 404 page is an essential part of a website that carries the responsibility for user experience and SEO optimization. A 404 page usually appears when users visit pages on the site that do not exist or have been deleted, resulting in a server returning a 404 error. If the webmaster does not set up a 404 page, dead links will occur, which is detrimental to search engine indexing when crawlers access such URLs.

Origin of 404 Not Found

Legend has it that before the third technological revolution, the form of the Internet was a large central database located in Room 404. At that time, all requests were completed manually. If the requested file could not be found in the database or if the requester had written the wrong file number, the user would receive a return message: room 404 : file not found. After the rise of the Internet, people became accustomed to using 404 as the error code for files not found by the server. Of course, actual verification shows that the legendary room 404 never existed.

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.

See more Introduction to HTTP Status Codes.

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