If I were tasked with establishing the goals and metrics for Facebook Work Chat, my primary consideration would be its main function as a business communication tool. Consequently, the overarching objective would be to enhance the communication experience and effectiveness for team members in a professional setting. With this objective in focus, specific sub-goals could include increasing user engagement, boosting user satisfaction, and improving user retention. To meet these objectives, we could monitor the following metrics: User engagement: We can assess the number of messages sent per user, the daily active user count, and the volume of calls made through the platform. Additionally, we could track the utilization of advanced features such as file sharing and conferencing. User satisfaction: This can be evaluated through regular surveys to gauge satisfaction levels across various factors such as speed, functionality, and user interface. User retention: We should monitor the churn rate and investigate the reasons behind customer departures, as this will provide valuable insights for improvement.