Omaha Hi/Lo is a “split pot” variant of the increasingly popular Omaha Poker. This is a more complicated version of poker with rules similar to standard Omaha.
The exception is that the pot is divided between both the best hand and the worst hand (known as the ‘high hand’ and ‘low hand’). Players can use two different cards to form the best high/low hands.
It is also referred to as Omaha Eight-or-better. It would be advisable for you to learn the game and the software playing Texas Hold’em before trying Omaha Hi/Lo for the first time!