What are the benefits of Google Hangouts?

Related questions

1. How much does it cost to use hangouts?
2. How secure is Google Hangouts?
3. Are Google Hangouts private?
4. Does Hangouts need WiFi?
5. Can you be hacked through Google hangout?
6. Do you need a Gmail account to use Google Hangouts?
7. Where do Google Hangout invites go?
8. Can you get hangouts on iPad?
9. How do you Gchat on iPhone?
10. What's the point of Google Hangouts?

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