Boosters are powerful items that can help you complete a level more easily. You can get them as a Daily Reward, a Chapter Reward, an Event Reward or by buying them from the in-game shop.

To take advantage of a Booster, you need to select them before the start of the level. A green outline will appear on the Booster you selected. To deselect the Booster, tap once more on the corresponding icon. 

Some Boosters will be similar to certain Power-Ups and behave the same way. The only difference is that they will be placed automatically on the board. 

There are however Boosters that do behave differently. These can be found on the right of the board. You activate them by clicking on them, which will not cost you a move. Each one of them has different special abilitites, so try them all!