Casino Blackjack, also known as 21, is a popular card game where players aim to beat the dealer by having a hand value closer to 21 without exceeding it. Each player is dealt two cards, with the option to hit for additional cards or stand. Face cards are worth 10, and Aces can be 1 or 11, adding strategic depth to the game. Players must consider their hand and the dealer's visible card to make informed decisions. The blend of luck and strategy makes Blackjack a thrilling experience in casinos worldwide.