In order to create a website, you need two things - a domain and a web hosting plan for it. The domain registration is the actual website address that you type in a browser to access a website, while the hosting space is where your website files is going to be. These are 2 tightly connected, yet individual services, while many people think that registering the domain name is enough. Very similar to the disk space and the monthly traffic features which a given website hosting plan offers, there are a certain number of registered domains which you can include as hosted i.e. you can have the web content for them in some account even if the domains have been registered through a different service provider. In technical terms, it doesn't matter whether a domain name is registered and hosted using the same company or is registered with one company and pointed to a different one - in either case your sites will function in exactly the same way.