There are many ways to forward traffic from one domain/website to another. The so-called URL redirection is commonly recommended. In contrast to parking a domain, a URL forwarding can be done 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 kind of function has several practical uses - if you want to switch your domain name, you can forward the site visitors, but the e-mails with the old one shall still be active in case you are making contact with customers or partners. When you have 2 identical sites and you would like to rebuild one of them, you can forward the visitors to the other Internet site to prevent losing potential customers, while you'll still be able to access the admin area for the first website and develop it.