If you want to register a domain to make sure that nobody else will take it, but you haven't built the website for it yet, you may park it. That is a service that registrar companies offer whenever a domain address is not linked to any web or e mail hosting service. By doing this, you'll be able to protect a brand name, for example, and you will own the domain in question even though it will not load any content. If you wish, you can pick some default template that the registrar provides, like For Sale or Under Construction, or you can direct the domain name to a new web address. The second option is extremely helpful if you own a few domain names, but you want all of them to open the same site. As an example, you could 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 only and the traffic to the other ones is going to be redirected to it.