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The 404 page is an essential part of any website, responsible for both user experience and SEO optimization. It typically appears when a user accesses a page that does not exist or has been deleted on the website, resulting in a 404 error returned by the server. If the site administrator does not set up a custom 404 page, dead links will 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 handled manually. If the requested file could not be found in the database, or if the user entered the wrong file number, they would receive a response: room 404 : file not found. After the internet emerged, people gradually adopted 404 as the standard error code for "file not found" on servers. However, in reality, there is no such thing as room 404.

Two Major Benefits of Setting a 404 Page

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

Learn more about HTTP Status Codes.

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