Goal-line technology is a system used in sports, particularly in football (soccer), to determine whether the ball has completely crossed the goal line. It employs various methods, such as cameras and sensors, to provide accurate and instant feedback to referees. This technology helps eliminate human error in crucial moments of a game. The system typically sends a signal to the referee's watch within seconds of a goal being scored. By using goal-line technology, officials can make more informed decisions, ensuring that the outcome of the match reflects the true events on the field.