Turn strategy is one of the most complex aspects of post-flop poker, as it is the point where ranges begin narrowing significantly and decisions carry increasing weight. On the turn, factors include how the turn card changes range advantages, which hands benefit from protecting equity, when to use large versus small sizings, and how the board texture evolves relative to both ranges. Solvers show that turn strategies involve multiple sizings and a complex mixture of bets, checks, and raises. Deep study of the turn is essential for players looking to advance to mid-to-high stakes.