you get 4 cards instead of 2. in the end your 2 best cards out of the 4 you hold are use to make the best 5 cards hand using 3 community cards. the betting, you can only bet anything up to what the current pot is. since you have 4 cards instead of 2 you have more chances of making a better hand on the turn and in the river. like a straight, full, flushes are more common in PLO. I love this game, it's a game to make a lot of money real quick if you know how to be patient and wait your turn and if you're lucky!