How could you increase the number of conversions your Shopping campaign receives for about the same total cost?
Increase your campaign priority
Decrease bids for product groups with a low cost per conversion, and increase bids for product groups with a high cost per conversion
Increase bids for product groups with low cost per conversion, and decrease bids for product groups with a high cost per conversion
Remove product group subdivisions and bid on broader groups of products
Explanation:
Low cost per conversion is good. If your budget is limited you should focus on well performing products to get even more conversions