Studying and analyzing hand histories involves reviewing past hands to identify patterns, mistakes, and areas for improvement. This includes examining decision-making at each stage of the hand, considering what alternative actions might have led to better outcomes. By focusing on key spots, such as bet sizing, position, and opponent tendencies, you can gain insights into how well you applied strategy and where adjustments are needed. Analyzing hands also helps in recognizing recurring leaks and refining strategies for future games, making it an essential practice for continuous development in poker.