There are many ways to forward visitors from one domain/website to another. The so-called URL redirection is commonly favored. In contrast to parking a domain name, a URL redirection is possible only if the domain in question is hosted. What this means in simple terms is that you can still open any content if you have a direct link to it and you could set up e-mail addresses or subdomains and use them. This type of function has many practical uses - if you choose to switch your domain, you could redirect the traffic, but the emails with the old one shall still be active if you are getting in touch with clients or partners. In case you have 2 very similar sites and you need to rebuild one of them, you can forward the visitors to the other Internet site so as to prevent losing potential clients, while you will still be able to access the administration area for the first site and develop it.