Poker is a card game in which the goal is to make the best 5-card hand. Unlike other casino games like blackjack where the odds are stacked against you, poker is a game of skill where players can improve their chances by bluffing or betting correctly on the strength of their hands. The short term luck element of the game is a factor, but long run expected value is determined by player action chosen on the basis of probability, psychology, and game theory.
The game starts with the dealer dealing 2 cards to each player. Then the first betting round begins. Each player can decide to call, raise or fold. The person with the highest hand wins the pot.
Once the first betting round is over the dealer puts 3 cards face up on the table that everyone can use. This is called the flop. After this a second betting round takes place. Then the dealer puts one more card on the board that everyone can use, this is called the turn.
Some poker books will tell you to only play your strongest hands, such as pocket kings or queens. However, this is not the only way to play the game and can often lead to disaster if you run into an ace on the flop. It is much better to be cautious with medium-strength hands and only call or raise when you have a strong chance of winning.