In my opinion a compliment is saying something nice or just saying something good about the person it can go both ways.
Answer:
All I know about this is that radio stations use it as the title of promotions. You have to listen to the station to hear a particular phrase announced, which you then say if somebody from the station phones you (I think that's how it works). If you utter the designated phrase, you get cash. So there is no one phrase that pays.
Three tips to start a healthy relationship is trust, no controlling, and space