To measure success for Facebook Marketplace, it's important to consider a variety of metrics that align with the goals of the platform. Some potential metrics to track include: 1. Active users: This metric would measure the number of users who are actively using the Marketplace platform on a regular basis. This could be tracked on a daily, weekly, or monthly basis, depending on the needs of the team. 2. Number of transactions: This metric would track the number of successful transactions that take place on the Marketplace platform. This metric would be a good indicator of the overall health of the platform, as more transactions would indicate that more users are finding value in the platform. 3. Revenue: This metric would track the revenue generated by the Marketplace platform. This could include fees charged for transactions, as well as any advertising revenue generated by the platform. 4. User engagement: This metric would track how engaged users are with the platform. This could include metrics such as time spent on the platform, number of items viewed, or number of conversations initiated between buyers and sellers. 5. Customer satisfaction: This metric would track how satisfied users are with the Marketplace platform. This could be measured through surveys or other feedback mechanisms. Overall, success for Facebook Marketplace will depend on a combination of these metrics, as well as others that are specific to the platform. As a product manager, it's important to regularly track and analyze these metrics to ensure that the platform is meeting the needs of its users and driving value for the company.