Poker is a card game played between two or more players. The game evolved from a simpler card game known as three-card brag, which became popular in the United States around the time of the American Civil War. Later the game spread to Europe, where it was developed further, and it also took root in Asia. Today, it is a global game enjoyed by millions of people.

When a player’s turn comes to bet, they may choose to match the amount bet by their predecessor or raise it. The player who chooses to match the previous bet is said to “call” the hand. If they wish to raise the bet, they say “raise” and put a larger amount of chips in the pot.

In most poker variants, the right to deal a hand rotates between players and is marked by a token known as a dealer button. This determines the order of betting.

There are usually one or more betting intervals in a hand of poker, and at the end of the last betting round the players reveal their cards and the player with the best hand wins the pot.

A player’s chances of having a good hand are greatly improved by using strategy. This includes reading the other players at the table, observing their body language, and calculating the odds of having a winning hand based on the betting action. This requires a combination of poker knowledge, psychology, and game theory.