If you would like to point a domain name 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 forwarded loses all of its records (A, MX, and so forth) and instead, it takes the A record of the domain it is directed 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 and not only will it be directed to the site that you've set up, but it will also be displayed in the browser address bar at all times. Other possible uses of a CNAME record are to redirect all of 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 setting up a CNAME record for a subdomain due to the fact that this kind of a record created for the main domain address renders it impossible to use e-mail addresses.
