If you wish to point a domain name that you have to another domain 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, and so forth) and instead, it takes the A record of the Internet 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 and not only will it be forwarded to the site you have created, but it'll also be displayed in the 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, or to use the webmail service of your webhosting company by using webmail.your-doman.com, for instance. The latter will work only by setting up a CNAME record for a subdomain because such a record created for the main domain address renders it impossible to use e-mail addresses.