You will gain the following benefits:
a. Earn extra Coins from orders on the Order Wheel, Catering Truck, Chef’s Store by training
all Chefs and Junior Chefs.
b. Earn extra XP from served orders by training Waiters.
c. Earn extra coins from the Mocktail Counter by training the Bartender.
d. Earn extra XP from the Singer Stage by training the Singer.
As you higher up your level, you will be able to gain higher benefits.

Note: Every benefit earned is valid through the life-time of your game.