in the mid evil times, a jester, or jokester, was required to entertain the king. the dictionary defines a jester as a jokester and fool. a jester is basically a clown and their job is to entertain the king and bring a smile to the monarchy. the would tell jokes do anything to bring joy to the royalty. Therefore, the jesters were meant to keep the king happy and joyful by telling jokes, doing tricks, and much more.