How do poker hands work and what determines the ranking of hands in a game of poker?

In Poker, hands are ranked based on the combination of cards a player holds. The ranking of hands is determined by the probability of getting that particular combination. The highest-ranking hand is a Royal Flush, which is a straight flush of the highest cards in a suit. The lowest-ranking hand is a high card, where the value of the hand is determined by the highest card in the player's hand. The ranking of hands in poker helps determine the winner in a game based on the strength of their hand compared to other players.