To ignore the base price of a child product in apromotion and change it to...

To change the base price of a child product in a promotion to a different price, you would use an "override". Overrides allow you to set a specific price for a product within a promotion, disregarding its listed base price. This functionality is essential for promotions where special pricing is a key aspect of the sales strategy, providing flexibility to offer promotional pricing that may differ significantly from the standard pricing.