Cart & Checkout Events

These events cover the money funnel — cart changes, coupons, the checkout steps, and the final purchase. They are the events most tags care about.

Cart and add-to-cart tracking

Events

Event	Fires when	Key payload
`cart_item_added`	A product is added to the cart.	the added `item` with `quantity`, `value`
`cart_item_removed`	A product is removed from the cart.	the removed `item`
`cart_viewed`	The cart page renders.	`items[]`, cart `value`
`coupon_applied`	A coupon is applied.	`coupon`, updated `value`
`coupon_removed`	A coupon is removed.	`coupon`
`checkout_started`	A shopper enters checkout.	`items[]`, `value`
`shipping_selected`	A shipping method is chosen.	`shipping_tier` (carrier/title if enabled)
`payment_selected`	A payment method is chosen.	`payment_type` (title if enabled)
`payment_completed`	An order is placed (success page).	`transaction_id`, `value`, `tax`, `shipping`, `items[]`

Example — add to cart

{
  "event": "cart_item_added",
  "data": {
    "currency": "USD",
    "value": 49.00,
    "items": [
      { "item_id": "24-MB01", "item_name": "Joust Duffle Bag", "price": 49.00, "quantity": 1 }
    ]
  }
}

Example — purchase

{
  "event": "payment_completed",
  "data": {
    "transaction_id": "000000123",
    "currency": "USD",
    "value": 108.00,
    "tax": 8.00,
    "shipping": 5.00,
    "items": [
      { "item_id": "24-MB01", "item_name": "Joust Duffle Bag", "price": 49.00, "quantity": 2 }
    ]
  }
}

The reported value (and whether it excludes tax/shipping, and in which currency) follows your Tracking Data Tuning settings. Carrier and payment titles appear on shipping_selected / payment_selected only if you enabled Include shipping carrier name / Include payment method name.

Multishipping

The purchase funnel has parity with Magento's multishipping checkout — checkout_started, shipping_selected, payment_selected, and payment_completed fire there too, so multi-address orders are tracked like single-address ones.

Enhanced Conversions

When enabled and consented, payment_completed also carries data.user_data with hashed email/phone (never plaintext) for Google Ads Enhanced Conversions. See Consent & PII.

Verify

Add a product, proceed through checkout, and place a test order while in GTM Preview mode. Confirm payment_completed fires once on the success page with the correct transaction_id and value.