If you'd like to direct a domain that you have to a different domain name or subdomain, a good way to do that would be to use a CNAME record. By creating such a record, the domain name being redirected loses all of its records (A, MX, etc) and instead, it takes the A record of the domain address it's forwarded to. In 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 that you've created, but it'll also appear in the browser address bar at all times. Alternative possible uses of a CNAME record are to forward all the visitors from different subdomains to their main domain name, or to use the webmail service of your hosting company by using webmail.your-doman.com, for example. The latter will work only by setting up a CNAME record for a subdomain since this type of a record set up for the main domain address renders it impossible to use e-mail addresses.