Energy is a core feature of the game that essentially allows you to play the game.

Energy is used in two different ways, either for running through a world, missions or trials, or for Quick Patrol.

TIP: From the main menu, tap the energy icon at the top of the screen to display the menu shown in the screenshot.

If you're low on energy and don't feel like waiting, you can watch an advert to quickly replenish your energy. You can watch an advert 6 times before you have to wait to watch it again.