Poker is a card game that involves betting, and can be played with one or more decks of cards. The player with the best hand wins the pot, or the amount of money bet by all players in a single round of betting. There may be rules for how this money is shared at the end of the game.
The game of poker is typically played with a standard set of rules, but there are also many variations of the game. Some of these differences are in how the cards are dealt, and whether or not hands such as flushes and straights are considered. Other variations are in how the pot is awarded.
Generally, the game begins with an ante, or a small bet that all players contribute to the pot before the deal. Then a number of rounds of betting occur. In these rounds, players can fold (give up their hand), check (pass on betting), or raise. When a player raises, they put more chips into the pot than the previous player.
After the first round of betting, three cards are dealt face-up in the center of the table (revealed to all players). This is called the flop. There is a second round of betting, and then players show their cards at the end of the hand. The player with the best five-card hand wins the pot. The other players may choose to call, or match the bet made by the last player.