Q: My product names and revenue show '(not set)' in the ecommerce report — what's the fix checklist?

Q: My product names and revenue show '(not set)' in the ecommerce report — what's the fix checklist?
A: Ecommerce reports read only from the items array, not loose params:
— Confirm every ecommerce event (view_item, add_to_cart, purchase) carries an items: [{...}] array.
— Inside each item use exact keys: item_id, item_name, price, quantity — typos like 'productName' won't map.
— DebugView → click the event → expand 'items' and verify the objects are populated, not empty.
— Don't send value without currency, or revenue silently drops.
TL;DR: Put data in the items array with GA4's exact key names, always pair value with currency, and verify the array in DebugView.
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