If you wish to create a web site, you need 2 things - a domain name and a hosting plan for it. The domain registration is the actual web address which you enter in an Internet browser to access a site, while the hosting space is where your site data is going to be. These are 2 closely connected, but separate services, while many people assume that registering the domain name is enough. Just like the disk space and the monthly traffic features that a given web hosting plan offers, there are a certain number of registered domains which you can add as hosted i.e. you can have the web content for them in some account even if the domains are in fact registered via a different company. In technical terms, it does not matter if a domain is registered and hosted with the exact same company or is registered with one company and directed to another one - in either case your sites will function in exactly the same way.