There are 2 services you need for a functioning web site - a domain and a website hosting plan for it. Any time you type the domain address in your browser, you see the content that is uploaded in the website hosting account, but if that domain name is not linked to such an account or to an email service, it's parked. In other words, the domain name is registered and you're its owner, but it doesn't have any content of its own. As a substitute, it can open either a pre-made “Under Construction / For Sale” Internet page from the registrar company, or it can be directed to any other URL of your choice. The main advantage of parking a domain is that you can keep it and make certain that nobody else is going to take it. In the meantime, it will not occupy a slot for a hosted domain inside your account. In addition, you can park domains if you have a .com, for instance, and you register domains with other extensions such as .net, .org or country-code ones to forward them to the main website so as to protect a brand name.