A 404 page is a page visited by a broken link with a message displaying that the page does not exist. 4XX is a type of server error. You can get a 404 error page also when the entire website is down. (See also Broken Link)
A 404 page is a page visited by a broken link with a message displaying that the page does not exist. 4XX is a type of server error. You can get a 404 error page also when the entire website is down. (See also Broken Link)