If you want to make a website, you need two things - your own domain and a web hosting plan for it. The domain registration is the actual web address which you type in a web browser to reach a website, while the hosting space is where your website data is going to be. These are 2 very closely connected, yet individual services, even though many people believe that registering the domain name is enough. Just like the disk space and the monthly traffic features that a given website hosting plan provides, there are a certain number of registered domain names you can include as hosted i.e. you can have the web content for them in some account even if the domains are in fact registered using a different firm. In technical terms, it doesn't matter if a domain is registered and hosted with the exact same company or is registered with one company and pointed to a different one - in any case your sites will function exactly the same way.