its principle is the same as the Product Accessory field since it allows you to offer the products in your catalog as an accessory, with the difference that this one flattens your variations, to allow your customers to order x quantity of each combination.
If you fill in a minimum of quantities, it is the quantity of the product, all variations combined, that will be counted.
The field takes into account the discounts by fixed quantities for the product in question and its variations
note : combinations must have 2 attributes for this field to work.