Poker is a card game in which players place bets on the strength of their hands. The game can be played for money or for fun, with the winner taking all or a share of the pot. Unlike most casino games, in which the outcome of a particular hand is determined largely by chance, poker strategy is based on a combination of probability theory, psychology and game theory.

Initially, the cards are dealt face down to each player. There are then a number of rounds of betting, depending on the rules of the game. Each round is initiated by an initial amount of money being placed into the pot by two players, known as blinds. These are mandatory bets and help to create an incentive for people to play.

After the initial round of betting, a third and then a final card are dealt face up to each player, known as the flop, turn and river respectively. This begins a new betting round with each player having the option to either match the current bet or raise it.

A good poker player learns to assess the strength of their opponent’s hand as much as their own. While it’s not possible to know exactly what the other players will have, you can develop your instincts by watching experienced players and imagining how you would react in their position. This is one of the most important skills in poker and will separate beginners from pros.