What are the Omaha high low rules and how do they differ from traditional poker rules?

Omaha high low is a Poker variant where players aim to make the best high hand and the best low hand. Each player is dealt four hole cards and must use two of them, along with three community cards, to make their hand. In Omaha high low, the pot is split between the best high hand and the best low hand, if there is one. This differs from traditional poker rules where the entire pot goes to the player with the best hand.