When a user buys a  product from a category "Apparels", he/she gets 5% off. Fore More Category based discounts Click here >> Category based Discount

The discount increases when more quantities are purchased from the same category

5 quantities from the same category get a 10% discount. 10 or more quantities get a 15% discount.

The cumulative checkbox has to be checked when you want to count the number of products across that category.