Blackjack Cards are worth their face value. So, a 5 is worth 5 and picture cards are all worth ten, the same as an actual 10. The exception is the Ace. The Ace can be worth 1 or 11, depending on which value suits the Player or Dealer best. Players and the Dealer are each dealt two cards at the start of the game.
The Dealer’s second card is face down. Firstly, all players at the table will need to make certain decisions about their hand, before the Dealer then follows the Blackjack rules as to whether to take additional cards themselves. At the end of the game, the Dealer’s Hand is compared to that of each of the players.
The Dealer never makes any decisions at all. That applies to the value of the Ace when one is dealt to them as per above, but also whether to take another card or not. The Dealer will always stop taking cards when they reach 17, 18, 19, 20 or (obviously) 21. On the other hand, Blackjack is a casino game that requires near-constant decision-making by the Player. In addition to deciding on your stake, at certain times players also need to decide whether to stick (not take any more cards) or twist (take one or more additional cards). They’ll also need to make decisions about whether they want to double up, or split.
Doubling up means doubling their bet, with the catch being they can only take one additional card.
Splitting can happen when a Player is dealt two identical cards and can choose to split their initial hand into two hands.