1. what is the social purpose of congratulating people? 2. what are the expressions commonly used to congratulate people?

1. Winning event
2. Very happy!
Semoga Membantu :-)

Answer:
________
1. Social function of congratulating people is to establish a good and harmonious relationship with friends, family, and business associates and can strengthen the bonds of brotherhood, friendship and business relationships.

2. => I appreciate your hard work so far
=> It's really amazing, good job!
=> I have never seen literature as good as yours, you are so great.

*Thanks*