Poker is a card game that involves betting and the possibility of making or losing money. It has numerous variants but most games share certain principles. Players contribute to a pot, or pool of chips (representing money), and the player with the highest-ranking hand wins the pot. Players may also bet that they have the best hand or bluff, and other players must either call the bet or concede.

The game of poker can be played by two or more people and is often played with a fixed limit on how much can be raised in each betting round. Players put in money, called the blind or ante, before being dealt cards that they keep hidden from other players. In most variants of poker, a minimum bet must be made by all players in the first round before the cards are dealt.

Once the first betting round is complete the dealer will place three cards face up on the table that anyone can use, known as the flop. A new betting round then takes place. The player with the best five-card poker hand is declared the winner of the game.

There are a number of different poker hands, and the rank is determined by their odds (probability). A pair contains two matching cards of the same rank, three of a kind is made up of 3 cards of the same rank and two unmatched cards, and a flush is 5 cards of consecutive ranks, all from the same suit.