If you want to register a domain name to make certain that no one else is going to take it, but you haven't built the site for it yet, you could park it. That is a service that registrar companies provide whenever a domain address isn't linked to any web or email hosting service. That way, you can protect a brand name, for example, and you will own the domain address in question although it won't load any content. If you would like, you can select some default template that the registrar offers, such as For Sale or Under Construction, alternatively you can forward the domain name to an alternative web address. The second option is extremely helpful if you own a few 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 will need hosting for the third domain address only and the traffic to the other ones is going to be redirected to it.