In Texas Hold'em poker, winning hands are ranked based on their strength, with the highest being a Royal Flush, which consists of A, K, Q, J, and 10 of the same suit. Following this are Straight Flushes, Four of a Kind, Full Houses, Flushes, Straights, Three of a Kind, Two Pair, and One Pair, with a High Card being the lowest. Understanding these rankings is crucial for players, as it influences betting strategies and decision-making throughout the game. Mastering the art of hand evaluation can significantly enhance a player's chances of success at the table.