Poker is a card game that is played with two or more players and involves betting. It is a game that requires skill, and in the long run the best players will win. The game is based on the principles of probability, psychology and game theory. It is a fast-paced, high stakes game in which the players make a series of bets against each other until one player has all of the chips or the other players fold their hands. There are many variations of the game, but all involve six or more cards and a pot.
Reading your opponents is a key part of the game. Developing an overall ability to read people is an important skill, and there are many books and people (including psychologists and law enforcement) who focus on the importance of facial expressions and body language. However, the art of reading your opponents at a poker table is more specific and is about observing their movements with their chips and cards as well as how they make their decisions in certain situations.
Another aspect of poker is the fact that players often self-select into games at different levels based on their perception of their own skill level. In most cases, better players will play higher stakes than worse or beginning players, and this tends to even out the overall distribution of skill levels at a table. As a result, it will take a longer series of games to see significant differences in skill level between players.