If you wish to forward a domain that you have to some other domain address or subdomain, one of the ways to do that would be to use a CNAME record. By setting up such a record, the domain name being redirected loses all of its records (A, MX, etc) and instead, it takes the A record of the Internet domain it's forwarded to. By doing this, if you are using a web design service by some provider that gives you a subdomain, you can use an actual domain name and not only will it be forwarded to the site that you've created, but it will also be displayed in the browser address bar at all times. Alternative possible uses of a CNAME record are to redirect all the visitors from different subdomains to their main domain, or to use the webmail service of your hosting provider by using webmail.your-doman.com, for example. The latter will work only by creating a CNAME record for a subdomain since this type of a record set up for the main domain makes it impossible to use email addresses.