There are 2 services you'll need for a working web site - a domain name plus a web hosting plan for it. If you type the domain name in your web browser, you see the content that is uploaded within the web hosting account, but if that domain name is not linked to such an account or to an email service, it is parked. In other words, the domain name is registered and you are its owner, but it doesn't have any content of its own. Rather, it can open either a pre-made “Under Construction / For Sale” Internet page from the registrar company, or it can be forwarded to some other URL of your choice. The benefit of parking a domain address is that you can keep it and make certain that no one else will take it. In the meantime, it will not occupy a slot for a hosted domain name inside your account. You can also park domain names if you have a .com, for example, and you register domains with other extensions like .net, .org or country-code ones to forward them to the main web site so as to protect a brand name.