If you want to point a domain 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 being redirected loses all its records (A, MX, etc) and instead, it takes the A record of the domain it is redirected to. 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 redirected to the Internet site you have 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 point all the traffic from different subdomains to their main domain, or to use the webmail service of your hosting provider 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 address makes it impossible to use email addresses.