Refer and Earn

Yashwanth asked 3 years ago

I don’t see anything about “Refer and Earn” in my Google Duo mobile application(IOS). I have invited my Dad and my Dad downloaded the app using my referral link. Still I didn’t get any cashback at all.
1. Can you please explain what’s happening here?
2. Can you please give the detailed steps on how to refer and how can we get money?