There are two separate services that you’ll need for a functioning site - a domain name plus a website hosting plan for it. Any time you type the domain name in your web browser, you see the content that is uploaded in the web hosting account, but if that domain is not linked to such an account or to an email service, it is parked. Put simply, the domain name is registered and you're its owner, but it lacks content of its own. As a substitute, it can open either a pre-made “Under Construction / For Sale” page from the registrar company, or it may be forwarded to some other URL of your choice. The main advantage of parking a domain is that you can keep it and be sure that nobody else will take it. In the meantime, it's not going to take a slot for a hosted Internet domain inside your account. You can also park domains if you have a .com, for instance, and you register domain names with other extensions like .net, .org or country-code ones to direct them to the main website in order to protect a brand name.