From the back of the box:
Bet You Know It brings high stakes to Trivial Pursuit. On each turn you'll bet whether your opponent knows the answer. Guess correctly and you can use your winnings to buy wedges, or earn your wedges on your turn by answering questions. In Bet You Know It, you don't have to know all the answers to win... but you'd better know your friends!
Bet on your opponents to earn chips and buy wedges
Everyone plays on every turn
More than 1,780 questions on 297 topic cards
A chance for a wedge on each turn -- victory is much closer