A card game that involves strategy, bluffing, and luck, in which players bet that they hold the highest ranking hand. Although there are many variations, all include betting rounds during which each player can either call (place a bet equal to the current bet), raise (increase the current bet), or fold (forfeit the hand). All bets are placed in a central pot that is awarded to the player with the best combination of cards judged according to a predetermined ranking system.

Online poker revenue for 2005 is expected to exceed $2.4 billion, according to Christiansen Capital Advisors.