There are a lot of ways to forward visitors from one domain/website to another. The so-called URL redirection is commonly preferred. In contrast to parking a domain, a URL redirection is feasible only if the domain name in question is hosted. What this means in simple terms is that you could still open any content if you have a direct link to it and you may set up email addresses or subdomains and use them. Such a function has lots of practical uses - if you choose to switch your domain name, you can redirect the visitors, but the emails with the old one shall still be active in the event that you are making contact with customers or partners. If you have 2 very similar sites and you want to rebuild one of them, you could redirect the traffic to the other site so as to prevent losing potential clients, while you'll still be able to access the administration area for the first website and work on it.