Companies offer volume discounts to their customers. For example, you may wish to offer a 10% case discount when a customer buys 12 bottles of wine (product).
If you want to offer a discount for multiple products, you need to make sure fields are set to the correct values for the following situations:
For Group Discounts - Make sure all products use the discount in each product's Discount Policies field.
All Products - Make sure all products using the discount do not have Disable Discount checked.
Minimum Quantity - Ensure the discount quantity applies to minimum quantity of items in the cart.