If you wish to register a domain name to make sure that nobody else is going to take it, but you haven't developed the web site for it yet, you can park it. This is a feature that registrar companies offer when a domain name is not connected to any web or e mail hosting service. In this way, you'll be able to protect a brand name, for instance, and you will own the domain name in question although it will not load any content. If you want, you can choose some default template that the registrar offers, like For Sale or Under Construction, or you can direct the domain name to another web address. The second option is extremely helpful in case you own a few domains, but you want all of them to open the same website. As an example, you could register domain.net and domain.org, then park them and direct them to domain.com. In this example, you are going to need hosting for the third domain address only and the traffic to the other ones is going to be redirected to it.