Players use card counting to track the ratio of high to low cards remaining in the deck, which influences their betting strategy and decisions during play. A higher count indicates a deck rich in high cards, prompting players to increase their bets and consider aggressive options like doubling down or splitting, as favorable cards can improve their chances of winning. Conversely, a low count suggests a deck with more low cards, leading players to bet less and be more conservative in their choices. This strategic awareness helps them optimize their gameplay based on the perceived likelihood of favorable outcomes.