For optimizing bids in a Display & Video 360 campaign based on a single conversion type, the “Use Maximize conversions” bidding strategy is the appropriate choice.

• Use Active View
• Use custom bidding
• Use Maximize clicks
• Use Maximize conversions

The correct answer is: Use Maximize conversions

Explanation: This approach aims to optimize for a specific performance goal, ensuring that achieving the line item’s performance objective is prioritized over the complete expenditure of the budget. Should the performance goal set be excessively ambitious, it could lead to situations where the budget allocated for the line item is not fully utilized.

Read more here: https://support.google.com/displayvideo/answer/2997422