# Add discounts, upsells, and optional items

Boost sales with discounts and offers.

Reduce the amount charged to a customer by discounting their subtotal with coupons and promotion codes.

Offer customer free trials on subscriptions.

Enable customers to upgrade their subscription plan at checkout by using upsells.

Enable customers to purchase complementary products at checkout by using optional items.

Accept orders for no-cost line items, and apply 100% off discounts in payment mode.