What are Gmail hangouts?

Related questions

1. What does the green dot mean on Google Hangouts?
2. Is Gmail really shutting down?
3. How do I enable Hangouts in Chrome?
4. How can I tell if someone is online on Google Hangouts?
5. Do you need Gmail for Hangouts?
6. Can you tell if someone is on Hangouts?
7. Can you tell if someone blocked you on Hangouts?
8. Does Google Hangout cost?
9. Is Google Hangouts safe from hackers?
10. Can anyone use Google Hangouts?

Tags

1. #mobile
2. #available
3. #unified
4. #gmail
5. #android
6. #allows
7. #voice
8. #communications
9. #group
10. #service
11. #members
12. #initiate
13. #google
14. #either
15. #hangouts
16. #built
17. #participate
18. #video
19. #chats
20. #devices