This video talks about the concept of a relationship three concepts.
1. reciprocity is two people together.
Two ties in the business is to provide an effective way without expecting the consumer. For example, a sandwich shop to build relationships with customers when buying a sandwich, get one free piece 5 pieces.
3. The difference between reciprocity. Exchange business relationship together. Support each other without expecting something in return.
I agree with all three of these relationships because it makes the giver and the receiver happy. And causing friendship