If you'd like to register a domain to make certain that no one else will take it, but you haven't developed the web site for it yet, you could park it. This is a service that registrar companies provide if a domain 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 in question even though it will not open any content. If you'd like, you may choose some default template that the registrar offers, like For Sale or Under Construction, alternatively you can direct the domain to an alternative web address. The second option is very helpful in case you own a few domains, but you want each and every one of them to open the same website. For instance, you can register domain.net and domain.org, then park them and forward 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.