How could you increase the number of conversions your Shopping campaign receives for about the same total cost?

• 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 a 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
• Increase your campaign priority