Poker is a card game played by a group of players on a table. The game involves betting, and the player with the highest hand wins the pot. The game is usually played with a standard pack of 52 cards, although some games use more than one, or include additional cards called jokers. The cards are ranked in ascending order from the highest to lowest: Ace, King, Queen, Jack, and 10 (the suit does not matter). Players may raise or fold when it is their turn to act. They may also bluff, or try to make other players believe that they have a strong hand.

When players have a weak hand, they can try to force others into folding by raising their bets. This is a key aspect of poker strategy, and it can often be very effective. Bluffing can also help a good hand become even stronger, so it is important to know when to do this.

In addition to strategy, poker involves luck and psychology. Although the outcome of any individual hand largely depends on chance, the long-term expectations of the players are determined by their actions chosen on the basis of probability, psychology, and game theory.

The game is fast-paced, and the players bet in turn, starting with the player to their left. Each player must place an amount of chips into the pot in order to act; this is known as placing a bet. In fixed-limit games, a maximum limit is set on the number of raises in any betting interval.