What are the boosters listed under weekly challenges?

Boosters are when you use the arrows for 3 extras moves or the hour glass for 15 extra seconds. They can only be used on levels where you have a limited amount of moves or time. You’re welcome ;)

I used the spin (not with ad, I had tickets) and it worked!

I also wondered where to find the boosters to use

I did have a task to use 2 boosters

I didn't find it, but this morning I use my spin 2 times and I received 2x the hourglass thing and there they tell me I completed my task

Using the spaceship to remove a granny in the school bus game worked.

That would be using an extra 15 seconds or extra 3 moves.

Try the multiplier at the end of a level