Q: Is sending a 'purchase' event enough, or do I need the ecommerce items array too?

Q: Is sending a 'purchase' event enough, or do I need the ecommerce items array too?

A: The event alone undercounts you badly.

— A bare purchase event with just 'value' and 'currency' will populate revenue, but leaves every item-level report empty — no product performance, no item revenue.
— Send the full ecommerce schema: purchase with an 'items' array (item_id, item_name, price, quantity) so Monetization → Ecommerce purchases fills in.
— Common miss: 'value' should equal the order total including shipping/tax per your choice, but item 'price' is per-unit — mismatches make revenue look wrong.

TL;DR: Always include the items array, not just value+currency, or product reports stay blank. And keep order 'value' consistent with item prices.

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