Players must make the best possible 5 card poker hand using the 5 community cards and their own face down hole cards. The best 5 card poker hand wins the hand and receives the pot. At various stages players bet against each other on the value of their hands. A player can fold their hand at any stage.
Any game that involves wagering on an outcome can be considered gambling. Poker, along with sports betting, are unique forms of gambling that also qualify as games of skill. If you're talented enough at poker or sports betting you can turn a profit in the long run.