If you'd like to forward a domain that you have to another domain address or subdomain, one of the ways to do this would be to use a CNAME record. By setting up such a record, the domain being redirected loses all its records (A, MX, and so forth) and instead, it takes the A record of the domain it's redirected to. By doing this, if you use a web design service by some company that gives you a subdomain, you can use an actual domain and not only will it be redirected to the website that you have set up, but it will also be displayed in the web browser address bar at all times. Alternative possible uses of a CNAME record are to direct all the traffic from different subdomains to their main domain name, 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 since this kind of a record created for the main domain name renders it impossible to use e-mail addresses.