Population tendencies describe the common and systematic behavioral patterns observed across most players at a given stake level or game format. Understanding these tendencies allows exploitative players to adjust strategies to profit from the most frequent mistakes made by the population. The population at low stakes, for example, tends to bluff rarely on the river and donk-bet with weak hands, creating clear exploitative opportunities. Knowledge of population tendencies is the foundation of exploitative play and contrasts with GTO which assumes a balanced opponent.