Visitors can use this tool to check the server response of just one or a large batch of URL’s to see which ones might be redirected or which ones might come up 404 not found. If you are doing business with a company this is a great way to see if there website is genuine and not redirecting you to a porn site. It will also show a 404 error if the site is unavailable. Not all redirects are bad as they are often used to redirect from pages no longer in use to ones that are. Being aware of redirects is important though as is if the site is working.