If you want to create a web site, you need 2 things - a domain and a web hosting plan for it. The domain registration is the actual website address that you type in a web browser to reach a website, while the hosting space is where your website files is going to be. These are two closely connected, yet individual services, while many people assume that registering the domain is enough. Very similar to the disk space and the monthly traffic features that a given hosting plan provides, there are a certain number of registered domains you can include as hosted which means that you can have the web content for them in some account even if the domains have been registered via a different company. In technical terms, it doesn't matter if a domain is registered and hosted using the same company or is registered with one company and pointed to another one - either way your websites will operate in exactly the same way.