Poker is a card game, the most popular of a class of games called vying games, in which players with fully or partially concealed cards make wagers into a central pot, which is awarded to the player or players with the best combination of cards or to the player who makes an uncalled bet. Poker can also refer to video poker, a single-player game seen in casinos much like a slot machine, or to other games that use poker hand rankings.

The most popular poker variants are as follows:

Draw poker

Players each receive five — as in five-card draw — or more cards, all of which are hidden. They can then replace one or more of these cards a certain number of times.

Stud poker

Players receive cards one at a time, some being displayed to other players at the table.

Community card poker

Players combine individually dealt cards with a number of "community cards" dealt face up and shared by all players. Two or four individual cards may be dealt in the most popular variations, Texas hold 'em and Omaha hold 'em, respectively.

Poker is played in a multitude of variations, but most follow the same basic pattern of play.

Now, online poker games are a rage, even among the traditional players of the game.There are many reputed sites on the internet. source: wiki