What marketing objective should you choose if your goal was to increase scale and improve CPA performance and efficiency?

If your goal is to increase scale and improve Cost Per Acquisition (CPA) performance and efficiency, you should choose the marketing objective of "Conversion". Here's why:

1. Identify Your Objective: The first step is to clearly define your marketing objective. In this case, you want to increase scale (reach more people or generate more actions) and improve CPA performance (get more value for each dollar spent on acquiring a customer).

2. Choose the Right Objective: Different marketing objectives are designed to achieve different goals. If you want to increase scale and improve CPA, the most suitable objective is "Conversion". This objective is designed to drive valuable actions on your website or app. It's all about getting people who are interested in your business to take the next step, like making a purchase or filling out a form.

3. Implement Conversion Tracking: To measure and improve your CPA, you need to track conversions. This means setting up a system to record whenever someone completes a valuable action on your website or app. This could be anything from making a purchase to signing up for a newsletter.

4. Optimize for Conversions: Once you're tracking conversions, you can start optimizing for them. This means adjusting your marketing strategies to drive more conversions and improve your CPA. This could involve anything from tweaking your ad copy to adjusting your bidding strategy.

5. Monitor and Adjust: Finally, it's important to regularly monitor your CPA and make adjustments as necessary. If your CPA is too high, you might need to adjust your targeting or bidding strategy. If it's too low, you might be able to afford to reach more people.

By choosing the "Conversion" objective and following these steps, you can increase scale and improve CPA performance and efficiency.