If Superpower Batteries' business goal is to encourage repeat purchases, which advertising metrics will help them measure performance?

The correct answer is "Conversion rate." Conversion rate is the most relevant metric for measuring performance when the business goal is to encourage repeat purchases. This metric indicates the percentage of customers who take the desired action—such as making a purchase—after interacting with an ad. A high conversion rate suggests that the ad is effectively driving customers to complete a purchase, which is particularly important for encouraging repeat business. By tracking the conversion rate, Superpower Batteries can assess how well their ads are persuading customers to return and buy again. In contrast, detail page views measure the number of visits to the product page, and click-through rate (CTR) tracks the percentage of clicks on the ad, but neither directly measures repeat purchases or customer retention as conversion rate does.