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404 Not Found | Online Tutorial

404 NOT FOUND!

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The 404 page is an essential part of any website, playing a crucial role in user experience and SEO optimization. A 404 error occurs when a user attempts to access a page that does not exist or has been deleted on the website. If the site owner fails to set up a custom 404 page, dead links may appear, which negatively impacts search engine crawling and indexing.

Origin of the 404 Not Found Error

It is said that before the third technological revolution, the internet was essentially a large central database located in room 404. At that time, all requests were manually processed. If the requested file could not be found in the database or if the user entered the wrong file number, they would receive a message: "room 404: file not found." After the internet emerged, people gradually adopted "404" as the standard error code for missing files on servers. However, historical research confirms that room 404 never actually existed.

Two Major Benefits of Setting Up a 404 Page

  • Guide users not to leave the website, improving user experience.
  • Prevent dead links from appearing on the site.

Learn more about HTTP status codes.

404 Error Image
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