Complex sentence: The web site hosting server will typically generate "404-Not Found" web page, when users attempts to follow a broken or dead link, hence the 404 error is one of the most recognizable errors users can find on the web.
Split into simpler sentences: The web site hosting server will typically generate "404-Not Found" web page, when users attempts to follow a broken or dead link. Hence making the 404 error one of the most recognizable errors users can find on the web.