A domain registrar is whom you purchase your Internet domain name from. For example, jm2marketing.com purchased their domain name from a company called GoDaddy. They are not the only game in town. There are names like Network Solutions, 1&1 Internet, and Namecheap is just a few of the main players in the United States.
With that information what really does a domain registrar do besides take anywhere from $5-$40 a year from your pocketbook?
The first step of being online is purchasing a domain name from a domain registrar. Where you host your DNS, your website, or your email is up to you.