If you'd like to register a domain name to ensure that nobody else will take it, but you have not built the site for it yet, you could park it. This is a feature that registrar companies offer when a domain is not connected to any web or email hosting service. This way, you'll be able to protect a brand name, for example, and you will own the domain name in question even though it won't open any content. If you would like, you can pick some default template that the registrar provides, such as For Sale or Under Construction, or you can forward the domain name to a different web address. The second option is very helpful in case you own a number of domain names, but you want all of them to open the same site. As an example, you can 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 only and the traffic to the other ones is going to be redirected to it.