Hangouts is one of many chat and video conferencing apps. While it has a few advantages over services like Facebook Messenger, Skype, and Snapchat, it also has a few drawbacks. I do like Hangouts for voice and video chat for work because of its compatible with Google Docs and screen sharing capability. This makes sharing ideas and working collaboratively much easier. Now Google has added another great feature allowing users to share a presentation in the Hangout. Hangouts and Google Drive are a great way for students with limited transportation options or who live in rural areas to work together when they are not at school.
http://googleappsupdates.blogspot.com/2015/08/host-google-slides-presentations-via.html?m=1