ใช้ส่วนลดกับเหตุการณ์อีคอมเมิร์ซ

gtag("event", "purchase", {
    transaction_id: "T_12345",
    coupon: "socksSale",
    value: 12.00, // value = quantity x sale price
    currency: "USD", // The currency of the value, discount, and price
    items: [
     {
      item_id: "SKU_12345",
      item_name: "Socks",
      discount: 2.00, // The discount per item
      price: 4.00, // The sale price is the per item list price (6.00) minus discount (2.00)
      quantity: 3 // The number of items sold
    },
]
});