It is vital to learn poker sequence and hand rankings because: 1. They signify the power of the different hands you can play 2. They act as an essential help in decision-making during the game A standard poker hand ranking order underlines all game variants by categorizing the corresponding strength of various poker hands so players can easily decide which hand wins the round. Such a ranking system is used in viral poker variants like Texas Holdem, Omaha, and 3-card.