The Hi-Lo System is a popular card counting strategy used in the game of blackjack. It helps players keep track of the ratio of high to low cards remaining in the deck. In this system, cards are assigned values: low cards (2-6) are counted as +1, high cards (10-Ace) as -1, and neutral cards (7-9) as 0. By maintaining a running count, players can make more informed betting decisions. When the count is positive, it indicates a higher proportion of high cards left in the deck, favoring the player. Conversely, a negative count suggests more low cards remain, which is advantageous for the dealer. The Hi-Lo System allows players to adjust their bets based on the count, potentially increasing their chances of winning.