There are many ways to direct a domain name to another domain or subdomain and one of them is by setting up a CNAME record. If you own a domain and you've set up a website through some online service which supplies you with a service subdomain, you can easily link the two by setting up a CNAME record for your-domain.com that redirects to subdomain.provider.com. What you are going to achieve as a result is that www.your-domain.com is going to be in the Internet browser address bar while it opens the already mentioned website from the servers of the third-party provider. It is very important to know that if you create a CNAME record, any other records your domain address may have will stop working, so you can't have both a CNAME record directing to one company and working email addresses with another one. The CNAME record is always an alpha string, not a number, and sometimes more configuration may be needed with the other provider.