What is a repeated game? Hoe does this helps the players in a game?

A repeated game is one that is played over and over again a number times. They give all of the players the opportunity to learn something about each other's behavior patterns and, perhaps, to arrive at mutually beneficial arrangements. In practice, this amounts to tacit collusion. The two competing firms never actually get together to reach a joint decision on product price and quality, behavior that is illegal. But they watch one another's behavior in their repeated game, and each eventually learns to adapt itself and go along with the other's behavior.