Full Glossary

404 Not Found

The most common error message a user might see when arriving at a page that is no longer accessible via the entered web address.

The HTTP 404 error represents that the browser could not find the page that was requested. Most sites will present an error page in this situation, sometimes with a "404 Not Found" message or title.

In the situation of a 404 Not Found error, most often the page has either been:

  • Moved to a new URL
  • Never existed (the URL was entered incorrectly)