If you'd like to point a domain address that you have to another domain or subdomain, one way to do that would be to use a CNAME record. By creating such a record, the domain address being forwarded loses all its records (A, MX, and so forth) and instead, it takes the A record of the Internet domain it's forwarded to. That 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 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 redirect all the visitors from different subdomains to their main 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 because this type of a record set up for the main domain name renders it impossible to use email addresses.