If you wish to register a domain to ensure that no one else will take it, however, you haven't developed the web site for it yet, you could park it. That is a feature that registrar companies provide when a domain is not connected to any web or e mail hosting service. In this way, you can protect a brand name, for example, and you will own the domain name in question even though it will not open any content. If you want, you can pick some standard template that the registrar provides, such as For Sale or Under Construction, or you can direct the domain name to an alternative web address. The second option is extremely helpful in case you own a number of domains, but you want every one of them to open the same site. For example, you may register domain.net and domain.org, then park them and direct them to domain.com. In this example, you're going to need hosting for the third domain address only and the traffic to the other ones is going to be redirected to it.