Price reduction campaigns modify product prices (apply discounts) only during activation, deactivation, or refresh.

For example, if the campaign targets a specific collection, discounts are applied to the products in that collection at the time of activation.

If you add or remove products from a collection while a discount is active, the discount will not be automatically applied or reverted. To apply discounts to new products or restore original prices for removed products, you need to manually refresh the campaign.

If you add new products directly in the campaign settings, the campaign will automatically refresh when you click save — no extra steps are needed.