The code that is used to identify the promotion group. A promotion group consists of a set of items, sold-to business partners, or promotions that share the same set of promotion attribute values. Promotion groups enable you to link more than one promotion to a promotion matrix.
Example
The promotions A, B, C, and D maintain their discount, value off, or premiums on sales orders based on the Item and Area attributes. The value for the attribute item is Red Chair Type 101, the value for the area is Ba1. You can group these promotions in the C01 item promotion group.