If you want to make a website, you need two things - a domain and a web hosting plan for it. The domain registration is the actual web address that you enter in a web browser to access a site, while the hosting space is where your website files is going to be. These are two very closely related, yet separate services, even though many people assume that registering the domain name is enough. Similar to the disk space and the monthly traffic features that 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 when the domains are actually 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 - either way your websites will operate in exactly the same way.