If you want to register a domain to ensure that no one else will take it, but you have not built the site for it yet, you may park it. It's a feature that registrar companies provide whenever a domain name is not connected to any web or e mail hosting service. That way, you'll be able to protect a brand name, for example, and you will own the domain address in question even though it won't open any content. If you would like, you can choose some standard template that the registrar provides, such as For Sale or Under Construction, alternatively you can direct the domain name to a new web address. The second option is extremely helpful in case you own a number of domains, but you want all of them to open the same site. For example, you can register domain.net and domain.org, then park them and direct them to domain.com. In this example, you'll need hosting for the third domain name only and the traffic to the other ones will be redirected to it.