If you'd like to point a domain address that you have to another domain address or subdomain, the best way 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 on) and instead, it takes the A record of the domain it's redirected to. In this way, if you use a web design service by some company that gives you a subdomain, you can use an actual domain name and not only will it be forwarded to the Internet site that you've created, but it will also be displayed in the browser address bar at all times. Some other possible uses of a CNAME record are to forward all of the targeted traffic from various 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 since this type of a record set up for the main domain name makes it impossible to use email addresses.