You want to use Performance Max for conversion value but are concerned about inefficient spend. Which optional secondary bid strategy should you select?

In a Performance Max campaign focused on conversion value, selecting Target Return On Ad Spend (tROAS) as an optional secondary bid strategy allows you to maintain efficiency by setting a specific financial threshold for your spend. While the primary goal of the campaign is to maximize the total value of conversions, the tROAS constraint directs Google's AI to prioritize auctions where the predicted return meets or exceeds your specified percentage, preventing the system from bidding aggressively on low-value or high-cost placements that might otherwise lead to inefficient spending. This balance ensures that while the system pursues high-value shoppers across all Google channels, it remains anchored to your business’s profitability requirements and specific ROI targets.