If you wish to direct a domain name that you have to some other domain or subdomain, one of the ways to do that would be to use a CNAME record. By creating such a record, the domain name being pointed loses all its records (A, MX, and so forth) and instead, it takes the A record of the domain address it's redirected to. This way, if you use a web design service by some company that gives you a subdomain, you can use an actual domain and not only will it be directed to the site you have created, but it'll also be displayed in the browser address bar at all times. Alternative possible uses of a CNAME record are to point all of the targeted traffic from various subdomains to their main Internet domain, or to use the webmail service of your hosting company by using webmail.your-doman.com, for instance. The latter will work only by creating a CNAME record for a subdomain since such a record created for the main domain renders it impossible to use email addresses.