Create multiple volume discount groups with custom tiers for different product ranges. Combine them with product-level discount codes that stack additively — 10% volume + 5% code = 15% total. Add order-wide discounts as percentage or fixed amount. All discount types work together seamlessly. Manage everything in an intuitive multilingual admin interface (EN, DE, ES, FR, NL) — configure tiers, assign products, create codes, and track discounts in one place.