Blackjack is a popular casino card game where players compete against the dealer to achieve a hand value closest to 21 without exceeding it. Each player receives two cards and can choose to hit (take another card) or stand (keep their current hand). Face cards are worth 10, aces can be 1 or 11, and all other cards retain their face value. The dealer follows fixed rules, typically hitting until they reach 17 or higher. Blackjack, an ace with a 10-value card, pays higher than a standard win. The game combines strategy, skill, and luck, with basic tactics like card counting sometimes used to gain an edge. It is widely available in casinos and online, offering fast-paced, engaging gameplay for enthusiasts.