If you wish to register a domain to make certain that nobody else will take it, but you have not created the web site for it yet, you can park it. It's a feature that registrar companies offer whenever a domain name isn't connected to any web or email hosting service. In this way, you'll be able to protect a brand name, for example, and you will own the domain in question even though it will not load any content. If you would like, you can choose some default template that the registrar provides, like For Sale or Under Construction, or you can direct the domain to another web address. Your second option is very useful if you own a number of domains, but you want all of them to open the same site. As an illustration, you may 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 is going to be redirected to it.