grossProfitMargin property

Gross profit margin is the percentage gross profit you made from orders attributed to your ads, after taking out the cost of goods sold (COGS).

How it works: You report conversions with cart data for completed purchases on your website. Gross profit margin is the gross profit you made divided by your total revenue and multiplied by 100%. Gross profit margin calculations only include products that have a cost of goods sold value in Merchant Center. Example: Someone bought a hat and a shirt in an order on your website. The hat is priced $10 and has a cost of goods sold value of $3. The shirt is priced $20 but has no cost of goods sold value. Gross profit margin for this order will only take into account the hat because it has a cost of goods sold value, so it's 70% = ($10 - $3)/$10 x 100%. This metric is only available if you report conversions with cart data.