Box Plus-Minus (BPM) is a basketball statistic that measures a player's overall impact on the game while they are on the court. It calculates the point differential when a player is playing, compared to when they are not, providing insight into their contribution to the team's performance. BPM is derived from various factors, including scoring, assists, rebounds, and defensive plays. It helps coaches and analysts evaluate a player's effectiveness beyond traditional stats like points or rebounds, offering a more comprehensive view of their influence on the game.