Coins

Coins are resource in Angry Birds Evolution, used for pretty much everything. The most important purpose is, of course, leveling up your birds, although almost any other actions will deplete them.

Procurement

 * Money is obtained by pretty much any action you take, including successful scouting!
 * The most reliable source of income is completing daily challenges, logging into the app every day, and of course, winning battles against the deplorable pigs!
 * Note that you can easily gain additional cash by hitting pig spectators and collecting the money they drop!