In order to create a web site, you need two things - your own domain and a hosting plan for it. The domain registration is the actual website address which you enter in a web browser to access a website, while the hosting space is where your website files is going to be. These are 2 tightly connected, yet independent services, even though many people assume that registering the domain is enough. Just like the disk space and the monthly traffic features that a given hosting plan provides, there are a certain number of registered domains that you can add as hosted i.e. you can have the web content for them in some account even when the domains have been registered through a different firm. 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 pointed to a different one - either way your sites will function in exactly the same way.