If you'd like to direct a domain that you have to a different domain name or subdomain, one way to do this would be to use a CNAME record. By creating such a record, the domain being forwarded loses all of its records (A, MX, etc) and instead, it takes the A record of the Internet domain it's directed 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 name and not only will it be forwarded to the website which you have set up, but it will also appear in the Internet browser address bar at all times. Some other possible uses of a CNAME record are to redirect all 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 setting up a CNAME record for a subdomain simply because this kind of a record set up for the main domain renders it impossible to use email addresses.
