If you wish to register a domain name to make sure that no one else is going to take it, but you haven't created the site for it yet, you can park it. That is a service that registrar companies offer if a domain name isn't linked to any web or e-mail hosting service. That way, you can protect a brand name, for instance, and you'll own the domain in question although it won't open any content. If you'd like, you can choose some default template that the registrar provides, like For Sale or Under Construction, you can also direct the domain to an alternative web address. The second option is very useful in case you own a few domain names, but you want every one of them to open the same site. As an illustration, you can register domain.net and domain.org, then park them and direct 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 will be redirected to it.