[null,null,["上次更新時間:2024-09-13 (世界標準時間)。"],[],["To apply a discount to an item in an ecommerce event, add the `discount` parameter, using the discount value, not a percentage. For instance, if a customer buys three pairs of socks at $6 each with a $2 discount per pair, the `purchase` event tag reflects this. Reports can use \"Item coupon,\" \"Order coupon,\" and \"Item revenue\" to track these discounts. For event-level discounts, custom metrics are needed.\n"],null,[]]