The idea of the Google Hangout app is to facilitate communication between two or more parties. Hangouts do not only offer your employees the ability to chat, voice calls, and video conferences; it can also be integrated with other Google apps like Calendar and Drive.

What is so special about hangout?

As a communication tool its well-rounded offering text, video, and voice chat options. Why Hangouts? Besides chat and free voice calling (within the United States), Hangouts is seamless with the rest of Google Apps (most notably Calendar), and you no longer even need a Google+ account to use it.

Are Google Hangouts private?

Yes, Google Hangouts are private. When you send or receive the message, it will only be visible to the parties involved in the conversation. No one can read your information other than the sender and the receivers until you initiate the group conversation by inviting them.