Poker is a card game where players place bets into a pot based on a combination of probability, psychology and game theory. In the end the winning hand is determined by the highest ranking cards left on the table. The cards are dealt in rotation from the dealer to each player. After each deal the dealer may shuffle. The shuffled pack is offered to the player to his or her right for a cut, which must be accepted. Once everyone has two cards the betting begins. Throughout the hand, bets are placed into the pot in order of clockwise turn. At the end of the hand, all players show their hands and the highest winning hand wins the pot.
It is important to learn to play in position. This allows you to study your opponents and control the size of the pot. It also means you can continue to play your marginal hands for cheaper when it is your opponents turn to act in a hand. It is important to be able to identify conservative players from aggressive players so you know which ones to avoid betting high and which ones to bluff against.
Many players spend too much time trying to read unrevealed tells. While they do exist, most of them are fake and should be disregarded as a whole. It is better to focus on the conscious things that players do at the table and categorize them into groups like tight-aggressive, loose-passive and so on. This will help you develop your quick instincts far more than concentrating on unconscious physical tells.