Energy represents the number of actions a player might perform in his city or his neighbors' city. While in your city your actions will cost one or more energy from the energy bar, while visiting the player have 5 energy to spend helping his neighbor.

Most actions cost energy, collecting rents, building, chopping trees and harvesting are only some of them. Energy recovers one point every 5 minutes or the player may use one of the many consumables that recover energy instantly, these consumables can be received as gift or bought in the build menu for cash, also every time a player increase his level the energy is fully replenished.