If you want to point a domain name that you have to a different domain name or subdomain, one way to do that would be to use a CNAME record. By creating such a record, the domain name being pointed loses all of its records (A, MX, etc) and instead, it takes the A record of the Internet domain it is directed to. In this way, if you use a web design service by some provider that gives you a subdomain, you can use an actual domain and not only will it be forwarded to the website that you've set up, but it'll also be displayed in the web browser address bar at all times. Other possible uses of a CNAME record are to direct all of the traffic from different subdomains to their main domain, or to use the webmail service of your webhosting company by using webmail.your-doman.com, for example. The latter will work only by setting up a CNAME record for a subdomain since this kind of a record set up for the main domain name renders it impossible to use e-mail addresses.