An official stops play and awards the opposing team a free opportunity or disadvantage to the offender. That formal punishment is a penalty. It enforces the rules and restores fairness after an infringement.

Penalties range from free kicks and penalty shots to time in a penalty box, loss of yardage, or player dismissals. Severity usually matches the nature of the foul—careless, reckless, or intentional. Some penalties also carry disciplinary cards or reports that affect future suspension.

Players and coaches study which actions risk penalties and how to draw them legally. Officials aim for consistency so that competitors know what to expect. A well-timed or poorly given penalty can shift the momentum of an entire contest.

The whistle and the subsequent signal turn an infringement into a concrete consequence.