Pit bosses monitor players at gaming tables to identify suspicious behavior, using their instincts, experience, and set protocols to detect unusual betting patterns. They utilize surveillance systems to spot cheating or collusion. Key indicators include irregular betting amounts and unexpected winning streaks, along with assessing players’ knowledge of the game, as unfamiliarity can indicate potential cheating. When fraud is suspected, pit bosses discreetly observe the player and reassess the game environment.