Currently the game has 6 different power-ups. All power-ups have a different effect, but ultimately they make you more competitive against your opponents by making your birds stronger or more accurate or even by shaking the earth itself!

Wingman: The Wingman is a super-powered bird that you can call upon when you need to deal out some extra destruction in Angry Birds Friends. You can summon the Wingman by clicking the Wingman icon in the right edge of the power-up menu. The Wingman will then swap places with whichever bird is currently in the slingshot. Note that if you activate Wingman, but don't use it before completing a level, you'll be awarded 10k points.

Boombox: Boombox is a TNT box with two different use cases. You can shoot the box directly to a building and it will explode on impact, or you can shoot the box with a higher arc and tap the screen to activate a parachute. The box will then descend slowly, exploding once it lands. Boombox gives 500 points upon destruction. 

Birdquake: The Birdquake is a power-up that shakes the ground in any level. It is best used for nudging pigs off of ledges and bringing unstable buildings crumbling to the ground.

Sling Scope: The Sling Scope is a power-up that allows you to see the bird's trajectory before launch. Once activated, the Sling Scope will remain on the slingshot until you complete, retry, or exit the level.

King Sling: The King Sling is a power-up that increases the initial launch speed of all your birds. This extends the range of the birds, and also does extra damage due to the speed increase.

Power Potion: The Power Potion is a power-up that increases the size and damage of the bird that is currently in the slingshot.