If you want to make a web site, you need two things - a domain and a hosting plan for it. The domain registration is the actual website address which you type in an Internet browser to reach a website, while the hosting space is where your site files is going to be. These are 2 very closely related, yet individual services, even though many people believe that registering the domain name is enough. Similar to the disk space and the monthly traffic features which a given hosting plan has, there are a certain number of registered domain names which you can add as hosted i.e. you can have the web content for them in some account even when the domains are in fact registered via a different company. In technical terms, it does not matter if a domain name is registered and hosted with the exact same company or is registered with one company and directed to another one - in any case your sites will function exactly the same way.