ICM is crucial in tournaments because it quantifies a player’s chip value in terms of potential prize money, influencing decision-making near pay jumps. It shifts the focus from pure chip accumulation to risk-adjusted play, where survival and payout considerations often outweigh chip EV. Understanding ICM helps players make optimal folds, avoid unnecessary confrontations, and exploit opponents who miscalculate risk, ultimately maximizing long-term profitability in tournament play.