If you'd like to point a domain that you have to another 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 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 provider that gives you a subdomain, you can use an actual domain name and not only will it be directed to the website that you've created, but it will also appear in the web browser address bar at all times. Alternative possible uses of a CNAME record are to redirect all of the visitors 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 setting up a CNAME record for a subdomain because such a record set up for the main domain name makes it impossible to use email addresses.