There are 2 types of boosters in the game: Start Boosters and Field Boosters.
Start Boosters can be selected before starting a level. Starting a level with a Start Booster replaces a random piece on the level with a special piece. You can:
🔸 Buy Start Boosters before the start of every level;
🔸 Get them as part of your daily bonus;
🔸 Get them as rewards for the in-game events and competitions.
Field Boosters are boosters that you can buy and use during the level.
🔸 Hammer: allows you to remove any piece on the field without spending a move;
🔸 Boomerang: allows you to remove one row and column of pieces on the field in the shape of a cross without spending a move;
🔸 Shaker: allows you to reshuffle all objects on the board, except blockers and other mechanics, without spending a move.