Explanation
To create a rebate benefit defined by a product dimension, the admin needs to add a related list of Benefit Mappings on the Rebate Type object. Benefit Mappings allow the admin to specify the criteria for qualifying products, such as product family, product category, or product name. The admin can also define the benefit value and the benefit type (percentage or fixed amount) for each product dimension. Benefit Mappings are used to calculate the payout amount for each rebate program based on the actual sales of the qualifying products. References: : Create and Manage Rebate Programs Unit | Salesforce Trailhead : Rebate Management Standard Objects - Salesforce Developers