There are a large number of advantages associated with using the unlimited domain hosting plan. With this type of hosting, you will be able to easily transfer any amount of data you want and that too without worrying about limits.
Unlimited domain hosting is actually when you have various sites operating under a single account with a control panel. In earlier times, you had to purchase separate hosting account for almost every site that you owned that simply meant that you needed various control panels.
However, the benefit of having a hosting company that can host unlimited domains is the fact that you will have just one control panel with all accounts. But each account will be featured with its own auto responders, FTP and email account.