The name of the game is to beat the Bank, in the person of the Dealer, without exceeding 21. Otherwise you lose your bet. If you reach a Blackjack (21) your bet is multiplied by 3. If you beat the Dealer without reaching 21, you win double your bet.
In blackjack, the goal is to beat the dealer. Your objective is to get as close to 21 with your cards without going over. The player wins if the value of their hand is higher than the dealer's without going bust. Going bust is when the value of your cards exceeds 21.