If you'd like to point a domain that you have to another domain address or subdomain, a good way to do this would be to use a CNAME record. By creating such a record, the domain name being redirected loses all of its records (A, MX, etc) and instead, it takes the A record of the Internet domain it is directed to. In this way, 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 forwarded to the website you have created, but it'll also appear in the web browser address bar at all times. Alternative possible uses of a CNAME record are to point all the targeted traffic from different subdomains to their main domain address, or to use the webmail service of your hosting provider by using webmail.your-doman.com, for instance. The latter will work only by setting up a CNAME record for a subdomain simply because this kind of a record created for the main domain renders it impossible to use email addresses.