Feather Busters is a time-limited solo event in Angry Birds Match where you progress through a series of steps by collecting feathers. 

Each step has its own target and reward. You advance by clearing feathers within levels. 

Every feather you collect during a level is added to your event progress only after you successfully complete that level, so finishing the level is key. If you lose or quit, any feathers collected in that attempt will not count.

As you reach the required number of feathers for each step, you unlock rewards and move forward in the event, working your way toward the Grand Prize at the final stage. More challenging levels, such as Hard and higher difficulty stages, can help you gather progress more efficiently.

Feather Busters becomes available once you reach level 28 and you participate simply by playing and winning levels while the event is active.