If you'd like to point a domain name that you have to another domain or subdomain, the best way to do that would be to use a CNAME record. By setting up such a record, the domain address being pointed loses all of its records (A, MX, etc) and instead, it takes the A record of the domain it's pointed to. That 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 site you have set up, but it will also be displayed in the browser address bar at all times. Other possible uses of a CNAME record are to point all the targeted traffic from different subdomains to their main Internet domain, or to use the webmail service of your webhosting company by using webmail.your-doman.com, for example. The latter will work only by creating a CNAME record for a subdomain simply because this type of a record set up for the main domain address makes it impossible to use e-mail addresses.