What is football holding signal?

The football holding signal is a gesture made by referees in American football to indicate that a player has committed a holding penalty. This typically involves the official extending one arm horizontally in front of their body while keeping the other arm at their side or raised. Holding usually refers to illegal grabbing or obstruction of an opponent, often by offensive players, which can result in a penalty. The signal helps players, coaches, and spectators understand the nature of the infraction.