I believe the Kelly Criterion is a formula that helps bettors determine the ideal bet size to maximize capital growth while minimizing bankruptcy risk. It involves balancing potential returns with the probability of winning. In blackjack, players use this criterion to decide what fraction of their bankroll to wager based on their perceived advantage over the house. This requires estimating winning probabilities and payout odds. By betting according to their edge, players can enhance long-term gains while managing risk.