Board Thread:Questions and Answers/@comment-107.204.98.101-20131227173926/@comment-82.141.69.90-20140316120102

You can use them, for example, on getting to next episode. You don't have to ask requests from your friends (in case you're playing in Facebook), you can pay your going with bars to get to next place immediately. If you only have 3 bars, you can't buy boosters. But if you have over 50 bars, you can buy boosters in the Yeti Shop. :)