If you'd like to direct a domain that you have to some other domain address or subdomain, one of the ways to do this would be to use a CNAME record. By creating such a record, the domain name being pointed loses all of its records (A, MX, and so forth) and instead, it takes the A record of the Internet domain it is directed 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 and not only will it be directed to the Internet site that you have created, but it will also be displayed in the Internet browser address bar at all times. Alternative possible uses of a CNAME record are to point all the targeted traffic from different subdomains to their main domain address, or to use the webmail service of your webhosting company by using webmail.your-doman.com, for example. The latter will work only by creating a CNAME record for a subdomain because such a record set up for the main domain makes it impossible to use email addresses.
