If you wish to register a domain name to ensure that no one else is going to take it, but you haven't created the web site for it yet, you could park it. That is a feature that registrar companies provide if a domain name is not connected to any web or e-mail hosting service. That way, you'll be able to protect a brand name, for instance, and you'll own the domain name in question although it won't load any content. If you would like, you can select some default template that the registrar provides, such as For Sale or Under Construction, you can also forward the domain to a new web address. The second option is very useful in case you own a number of domains, but you want every one of them to open the same site. For example, you may register domain.net and domain.org, then park them and direct them to domain.com. In this example, you're going to need hosting for the third domain name only and the traffic to the other ones will be redirected to it.