A 404 error page is an error message that appears when a server cannot fulfill a request for a specific webpage or resource because the page cannot be found. The 404 error page informs the user that the requested page is unavailable and may offer alternatives or links to other content on the site. The 404 error page can also be customized to give the user a better experience and ensure that they stay on the website instead of leaving due to the error message. A user-friendly 404 error page can help improve user retention and website rankings.
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