Poker is a game that involves playing with other people and using cards to create the best possible hand. There are several different variants of the game, but they all follow a similar basic set of rules.
The first step is to place a bet, usually a certain amount of money, into the pot before the cards are dealt. Depending on the rules of the game, one or more players may be required to do this before each round of betting.
A player can then raise or fold. If he raises, he can call the bet made by his opponent or he can bet more to increase the size of the pot.
Once the first betting round is over, the dealer deals three face-up community cards and everyone still in the hand gets a chance to bet or fold. Once this has happened, he deals a fourth card and everyone can again use it to create the best possible hand.
A player can also bluff, which is when he intentionally tries to convince other players that his hand has positive expected value or to confuse them into making mistakes. This can be useful in a number of ways, including pushing a weak hand out of the way and drawing opponents into a more complex and difficult hand.