Citation:
Prosocial behavior refers to actions that benefit other people or society as a whole, such as helping, sharing, donating, co-operating, and volunteering.
This is selfless concern for the well-being of others. It's like giving up your seat on a bus for someone who needs it more than you do.
This norm suggests that we should try to help others who need assistance, even without any expectation of future paybacks.
This social expectation encourages us to return favors received.