Blackjack, also known as 21, is a popular card game played in online casinos. The objective of the game is to beat the dealer by having a hand value closer to 21 without exceeding it. The game is played with a deck of 52 cards and the players are dealt two cards to begin with. The number cards have their face value, face cards are worth 10 points and the Ace can be worth either 1 point or 11 points. The game offers several different betting options including doubling down, splitting or taking insurance. Blackjack is a highly exciting and strategic game that requires both skill and luck to win.