Below is an example scenario that can be used to illustrate your answer.
Let's say there is a CoffeeMachine aggregate with a set of methods similar to the following:
Methods used by admins.
- AddIngredient
- AddIngredientContainer
- RefillContainers
- AddBeverage
Methods used by customers.
- CustomizeBeverage
- PurchaseBeverage
The users of the program will interact with this aggregate. What would be the classes and methods in the Application layer?