There are two separate services you need for a working website - a domain name and a website hosting plan for it. Each time you type the domain in your web browser, you see the content that is uploaded within the hosting account, but if that domain address isn't linked to such an account or to an email service, it's parked. In other words, the domain is registered and you're 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 may be forwarded to some other URL of your choice. The main advantage of parking a domain name is that you can keep it and ensure that no one else will take it. At the same time, it's not going to take a slot for a hosted Internet domain within your account. You could also park domains if you have a .com, for instance, and you register domain addresses with other extensions like .net, .org or country-code ones to forward them to the main website so as to protect a brand name.