In order to create a website, you need 2 things - a domain name and a hosting plan for it. The domain registration is the actual web address that you enter in a browser to access a site, while the hosting space is where your website files is going to be. These are two very closely connected, yet independent services, while many people think that registering the domain is enough. Similar to the disk space and the monthly traffic features that a given web hosting plan has, there are a certain number of registered domains which you can include as hosted which means that you can have the web content for them in some account even when the domains are actually registered using a different service provider. In technical terms, it does not matter whether a domain name is registered and hosted using the same company or is registered with one company and directed to another one - in any case your sites will operate exactly the same way.