We're aware of an issue with Facebook purchases for all King Games and our team is on it. 🛠️ Hang tight while we fix things! You can still enjoy the game, and we'll keep you posted once it's solved.
It is a free switch booster. You can use it to switch two pieces of candy without wasting a move. I explain it in much more detail in the commentary of this video. Hope it helps.
https://www.youtube.com/watch?v=9zmdcnn_1s4