# Promotion handlers

The Spree::PromotionHandler handles promotion activation. If the promotion is eligible, then the promotion can be activated, and finally applied by the Spree::PromotionActions associated with the promotion.

Promotions can be activated in three different ways using subclasses of the Spree::PromotionHandler model:

• Cart: Activates the promotion when a customer adds a product to their cart. In the Solidus backend, this is the handler used when an administrator assigns the activation method "Apply to all orders" to a promotion.
• Coupon: Activates the promotion when a customer enters a coupon code during the checkout process.
• Page: Activates the promotion when a customer visits a specific store URL.