In poker, winning hands are ranked based on their rarity and strength, with the highest being a Royal Flush, consisting of the Ace, King, Queen, Jack, and Ten of the same suit. Following this are Straight Flushes, Four of a Kind, Full Houses, and Flushes. A Straight, Three of a Kind, Two Pair, and One Pair follow in rank, with a High Card being the lowest. Understanding these rankings is crucial for players, as it influences betting strategies and decision-making during the game, ultimately determining who walks away a winner.