This question aims to evaluate your comprehension and capability to gauge the effectiveness of a product, specifically the Ads feature within Facebook Reels. Facebook Reels serves as a platform for short videos, while the product you oversee pertains to its advertising component. Your interviewer seeks to understand which metrics or key performance indicators (KPIs) you would utilize to determine the success of the Ads feature, thereby assessing your analytical abilities, product knowledge, and understanding of the company's overall KPIs. Guidance: Reflect on the primary objectives of the ad feature in Facebook Reels. These objectives could involve assisting advertisers in reaching their target audience, boosting user engagement, and generating revenue. Identify which metrics could indicate the achievement of these goals. Potential metrics include impressions or views, click-through rates (CTR), conversion rates, cost per action (CPA), and total revenue generated. As this role focuses on managing an advertising product, it would also be beneficial to mention metrics that are important to advertisers, such as Return on Ad Spend (ROAS).