The 404 Page system template is used whenever a visitor tries to access a page on your website that is missing, or when a visitor accesses a broken link.  Headway also creates a WordPress page (found under Pages-> Edit in the WordPress dashboard) called Whoops! 404 Error. This page is where you will enter a personal message for your visitors when they access a “bad link.”The 404 Page system template is used whenever a visitor tries to access a page on your website that is missing, or when a visitor accesses a broken link.  Headway also creates a WordPress page (found under Pages-> Edit in the WordPress dashboard) called Whoops! 404 Error. This page is where you will enter a personal message for your visitors when they access a “bad link.”