If you'd like to point a domain address that you have to some other domain or subdomain, the best way to do that would be to use a CNAME record. By creating such a record, the domain name being pointed loses all its records (A, MX, etc) and instead, it takes the A record of the domain it's pointed to. That way, if you use 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 directed to the Internet site which you have created, but it'll also be displayed in the web browser address bar at all times. Alternative possible uses of a CNAME record are to point all of the targeted traffic from various subdomains to their main domain address, or to use the webmail service of your hosting company by using webmail.your-doman.com, for instance. The latter will work only by creating a CNAME record for a subdomain since this kind of a record created for the main domain name makes it impossible to use email addresses.