There are numerous ways to point a domain to another domain or subdomain and one of them is by creating a CNAME record. In case you own a domain name and you've created 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 by doing this is that www.your-domain.com will be in the browser address bar while it opens the already mentioned Internet site from the servers of the third-party provider. It is important to know that if you set up a CNAME record, any other records your domain name may have will stop functioning, so you can't have both a CNAME record pointing to one provider and working email addresses with a different one. The CNAME record is always an alpha string, not a number, and in some cases additional configuration may be necessary with the other company.