Poker is a card game played between 2 or more players. The game involves betting and bluffing, and the decisions made by players are based on the principles of probability, psychology, and game theory. The strategic thinking required by the game can also help people with decision making in other areas of life, such as work and personal relationships.

The game is often considered to be an art, with many professional players developing their own unique style of play based on detailed self-examination and the use of external resources like books and other experienced players. Some players even discuss their strategies with other poker players for a more objective look at their strengths and weaknesses.

A major part of playing poker is reading the other players, particularly their body language and manner of speech. This information is used to figure out whether a player is bluffing or has an unbeatable hand. Professional poker players often use this knowledge to make better decisions, and are able to profit from their opponents.

Unlike other card games, such as chess, where all of the information is known at once, each poker hand is a battle of incomplete information. The game begins with each player being dealt two cards, and then a fifth community card is dealt (called the “river”). There are then several rounds of betting, starting with the two mandatory bets called blinds placed into the pot by the players to the left of the dealer.