There are two separate services that you need for a functioning site - a domain name and a web hosting plan for it. Whenever you type the Internet domain in your web browser, you see the content that is uploaded within the website hosting account, but if that domain name isn't linked to such an account or to an email service, it's parked. Put simply, the domain name is registered and you're its owner, but it doesn't have any content of its own. Instead, it can open either a pre-made “Under Construction / For Sale” webpage from the registrar company, or it may be forwarded to some other URL of your choice. The advantage of parking a domain address is that you can keep it and make certain that nobody else is going to take it. Meanwhile, it will not take a slot for a hosted domain name inside your account. You could also park domains if you have a .com, for example, and you register domain addresses with other extensions like .net, .org or country-code ones to direct them to the main web site so as to protect a brand name.