Broken link

Broken link is the term for a link that points to a non-existent page or a page containing an error.

The error message "error 404" - content not found - typically appears on the destination page. It's a good idea to monitor the functionality of links on an ongoing basis, as a broken link can be confusing to the user, or may discourage them altogether. On the other hand, you can take advantage of broken links on various servers as part of linkbuilding.