If you would like to direct a domain that you have to some other domain address or subdomain, one way to do that would be to use a CNAME record. By creating such a record, the domain being pointed loses all of its records (A, MX, etc) and instead, it takes the A record of the Internet domain it's redirected to. That 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 directed to the site that you have created, but it will also be displayed in the web browser address bar at all times. Other possible uses of a CNAME record are to forward all the visitors from different subdomains to their main Internet domain, or to use the webmail service of your hosting company by using webmail.your-doman.com, for example. The latter will work only by creating a CNAME record for a subdomain since such a record created for the main domain address renders it impossible to use email addresses.