If you want to direct a domain name that you have to some other 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 forwarded loses all its records (A, MX, etc) and instead, it takes the A record of the domain name it is pointed to. This way, if you are using 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 will also appear in the web browser address bar at all times. Some other possible uses of a CNAME record are to direct all of 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 creating a CNAME record for a subdomain because this kind of a record set up for the main domain address makes it impossible to use e-mail addresses.