17 How are promotions and campaigns structured in B2C Commerce?

Promotions and campaigns are configured entirely in Business Manager under Merchant Tools > Marketing > Promotions and Campaigns. Their relationship is:

1. Promotion — defines the discount rule: what qualifies (trigger conditions, e.g., minimum order value, specific categories, buy-X-get-Y) and what the shopper receives (percentage off, fixed amount, free shipping, free gift). A promotion on its own is inactive until linked to a campaign.
2. Campaign — groups one or more promotions with scheduling (start date, end date), customer group targeting, and source code / coupon code requirements. A promotion fires only if it belongs to an active campaign whose conditions are met at checkout time.

This separation allows the same promotion rule to be reused across multiple campaigns with different timing (e.g., Black Friday campaign vs. loyalty member campaign). Developers can also query active promotions programmatically via the dw.campaign.PromotionMgr API for custom UI indicators or loyalty integrations.