Basically the best hand wins, on the betfred ones you get 2 cards and 5 communal cards, with your 2 cards or 1 of your cards or none (but that would imply no-one can win if the best hand is in the 5 communal cards) + any of the 5 cards you need the best 5 card hand. Say if you had 2, 3s. Then the first 3 communal cards came up, there's a 3 in there, that means you wanna stay in, as usually 3 of a kind will take MOST peoples hands as it's a pretty good hand, but if the last 2 cards come up and there's another 3 you wanna put all yow money in there, as it means 2 of the cards in the communal 5 are helping you one hell of alot, whereas the others may not be gaining very much from them. But take a look at the other 3 as they may be 3 of the same suit or possibly part of a flush. Just look for the different hands, I've picked up a fair bit just playing in the fun ones (Y)