You simply pick; the team, YES, NO, OVER or UNDER that you think will be the correct result of each proposition for the challenge to earn the points stated in the proposition. The points are added up during the game and if you accumulate more points than everyone else that submits picks for the same challenge at the end of the game, you win. The concept is extremely easy but you do have to know about the game you're playing. If a team leading the league in turnovers is playing and the prop is "Which team will have the most take-aways in the game?", that's where your skill is used in the game.