If you'd like to register a domain to make sure that nobody else is going to take it, but you haven't built the site for it yet, you may park it. This is a service that registrar companies offer whenever a domain address isn't linked to any web or e-mail hosting service. In this way, you can protect a brand name, for instance, and you will own the domain name in question even though it will not load any content. If you wish, you can select some standard template that the registrar provides, like For Sale or Under Construction, you can also forward the domain to an alternative web address. The second option is very helpful if you own a number of domain names, but you want all of them to open the same website. As an example, 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 name only and the traffic to the other ones is going to be redirected to it.