If you'd like to register a domain to make certain that nobody else will take it, however, you have not built the web site for it yet, you can park it. This is a service that registrar companies provide whenever a domain is not linked to any web or e-mail hosting service. That way, you'll be able to protect a brand name, for instance, and you will own the domain in question although it won't open any content. If you want, you can select some standard template that the registrar offers, such as For Sale or Under Construction, or you can forward the domain name to an alternative web address. The second option is very helpful if you own a number of domain names, but you want every one of them to open the same site. For example, you could register domain.net and domain.org, then park them and forward 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.