If you wish to make a website, 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 site, while the hosting space is where your site data is going to be. These are 2 tightly related, yet individual services, even though many people believe that registering the domain name is enough. Much like the disk space and the monthly traffic features that a given website hosting plan features, 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 actually registered through a different firm. In technical terms, it doesn't matter whether a domain name is registered and hosted with the exact same company or is registered with one company and directed to another one - in any case your sites will function exactly the same way.