You have a goal to increase scale and improve CPA performance and efficiency. “Action” marketing objectives aligns to that goal.
The correct answer is: Action
Explanation: If your aim is to boost scale and enhance CPA performance and efficiency, opt for the “Action” marketing objective. This goal focuses on driving engagement with your business, product, or service, attracting new customers, and suits those who already employ conversion tracking in their campaigns and are open to experimenting for better long-term outcomes.