You're a PM for Meta. How would you measure the success of the onboarding and sign up experience for Facebook.

Focus on identifying key metrics that directly reflect user engagement and satisfaction during the onboarding and sign-up process. Consider both quantitative metrics, such as conversion rates, drop-off rates at each step of the onboarding flow, and time taken to complete the sign-up, as well as qualitative metrics like user feedback and satisfaction scores. Discuss how you would segment these metrics by user demographics or behaviors to gain deeper insights. Additionally, think about how you would set benchmarks for success and iterate on the onboarding experience based on the data collected.