There is a setting field for "Free Product" reward type. if condition of "Product Settings" matched, then customer will get configured free product.

This setting field has 4 checkboxed, they are below with description.

1. Multiply quantity by multiple tiers: Multiply the free product quantity of the same product based on multiple tiers calculated from the Product Settings minimum value.

2. Increase quantity for each matched cart item: Increase the free product quantity of the same product for each cart item that matches the Product Settings conditions.

3. Don't increase quantity if match same product: Prevent increasing the free product quantity when the same product is offered by other reward rules or free product line items.


If admin checked the Number 01 checkbox free product quantity will increase based on multiple tiers.
if admin check number 02 checkbox, then quantity of free product will be increase for each cart item.
if admin check number 03 checkbox, the quantity of free product will not increase if the same product available in other reward rule or reward line. 