If you wish to register a domain name to make certain that nobody else will take it, but you have not developed the web site for it yet, you could park it. It's a feature that registrar companies provide when a domain address is not linked to any web or e-mail hosting service. This way, you can protect a brand name, for instance, and you'll own the domain address in question even though it will not load any content. If you want, you may choose some standard template that the registrar provides, like For Sale or Under Construction, or you can forward the domain to a different web address. Your second option is extremely helpful if you own a number of domain names, but you want every one of them to open the same website. For instance, you could register domain.net and domain.org, then park them and forward 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.