Facebook Messenger multiple accounts together

From now on, Facebook Messenger can be used multiple accounts simultaneously. Facebook added such a facility. If you want to be able to use any account to keep personal information protected.
Many people may have been in the same room together. But there is only one mobile phone or tab. Everyone can use a device to Facebook Messenger. You can use such a way as to protect the personal matters. If you want to be able to give different passwords for each.
If a week ago, had the benefit of listening to the first. Now it's the customers at hand. However, this facility is limited to customers in the Android operating system just yet. IOS users will have to wait a few days.