If you want to forward a domain name that you have to a different domain or subdomain, one way to do this would be to use a CNAME record. By setting up such a record, the domain being forwarded loses all of its records (A, MX, and so forth) and instead, it takes the A record of the domain name it's forwarded to. That way, 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 pointed to the site you have set up, but it'll also appear in the browser address bar at all times. Alternative possible uses of a CNAME record are to forward all the targeted traffic from different subdomains to their main Internet domain, or to use the webmail service of your hosting company by using webmail.your-doman.com, for instance. The latter will work only by setting up a CNAME record for a subdomain simply because this kind of a record set up for the main domain name makes it impossible to use email addresses.