In Blackjack, players aim to get a hand value as close to 21 as possible without exceeding it. Each player starts with two cards and can choose to hit (take another card), stand (keep their current hand), double down (double their bet and take one more card), or split pairs into separate hands. Card values are based on face value for numbered cards, ten for face cards, and one or eleven for aces. The dealer follows specific rules, typically hitting until reaching at least 17. The objective is to surpass the dealer's hand value without going over 21, determining the outcome of the bets. Understanding these rules is essential for effective play.