What entertainment of the inhabitants of Western Europe contributed to the emergence and spread of coats of arms?

One of the favorite entertainment of Western Europeans in the 13-15 centuries. there was a knightly tournament. The spectators of the tournament did not see the faces of the knights, as they were covered with helmets. Therefore, as an identification mark, the participants of the tournaments began to have coats of arms on their shields and clothes. The coat of arms was a symbol of family honor; they also came up with their own motto for the coat of arms. The knights who took part in the tournaments were represented by heralds – heralds. From the word “herald” in the 19th century, the science of the coats of arms of heraldry appears. Coats of arms spread in England, Italy, France, Switzerland, and later in the New World, Africa, Australia, etc.