Apart from the normal quests, achievements are long-term tasks that you need to complete and completing them is a great way to earn cash!

Each achievement has 3 steps and you receive gift cash each time you complete a step. You'll see an exclamation point on the achievements button or Eva will remind you to accept your achievement gift when you complete one.

PS: The Expansion Master achievement can be done by expanding your cafe to the last 3 expansions (23x23, 24x24, 25x25).