If you would like to forward a domain name that you have to another domain address or subdomain, one way to do that would be to use a CNAME record. By setting up such a record, the domain address being redirected loses all of its records (A, MX, etc) and instead, it takes the A record of the domain name 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 pointed to the website that you have set up, but it'll also be displayed in the web browser address bar at all times. Other possible uses of a CNAME record are to redirect all of the targeted traffic from various subdomains to their main domain address, 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 simply because such a record set up for the main domain renders it impossible to use email addresses.