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 that you type in a browser to reach a site, while the hosting space is where your website data will be. These are 2 very closely related, but independent services, even though many people think that registering the domain is enough. Much like the disk space and the monthly traffic features which a given hosting plan has, there are a certain number of registered domain names which you can add as hosted which means that you can have the web content for them in some account even when the domains have been registered through a different company. 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 directed to another one - in either case your websites will operate exactly the same way.