There are a lot of ways to forward website visitors from one domain/website to another. The so-called URL redirection is often preferred. In contrast to parking a domain, a URL forwarding is feasible only if the domain in question is hosted. What this means basically is that you could still open any content if you have a direct link to it and you may set up e mail addresses or subdomains and use them. This sort of function has lots of practical uses - if you choose to switch your domain, you could forward the visitors, but the e-mails with the old one shall still be active if you are communicating with clients or partners. When you have two identical websites and you would like to rebuild one of them, you can redirect the visitors to the other website so as to prevent losing potential customers, while you'll still be able to access the admin area for the first website and improve it.