As the Product Manager for FB Marketplaces, I would focus on user acquisition, engagement, and monetization when setting goals. My primary objective would be to improve user acquisition, which I would measure by tracking the overall increase in new users and sellers on the platform. The second objective would be to boost user engagement, aiming to raise the percentage of daily active users and the conversion rate. Finally, monetization is also crucial. Therefore, I would strive to increase the average revenue per user by introducing new revenue streams, such as promoting listings or implementing transaction commissions. These three objectives are essential for driving growth and enhancing the platform's profitability.