If you wish to make a website, you need two things - a domain and a hosting plan for it. The domain registration is the actual web 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 two tightly connected, yet separate services, while many people think that registering the domain name is enough. Very similar to the disk space and the monthly traffic features that a given hosting plan offers, there are a certain number of registered domain names you can include as hosted which means that you can have the web content for them in some account even if the domains are actually registered through a different service provider. 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 directed to another one - in any case your sites will function exactly the same way.