LinkedIn Profile Completion: Measurement, Diagnosis, and Improvement

Context: You are a Data Scientist working on LinkedIn's Profile experience. "Profile completion rate" should be defined precisely, instrumented, and improved through analysis and experimentation. Assume you can track field-level events (e.g., photo, headline, experience, education, skills), sessions, device, and notifications.

Answer the following:

1. How would you define and measure "profile completion rate" on LinkedIn?
2. If you notice a drop in profile completion rate over the last quarter, how would you diagnose the root cause?
3. Propose two different product solutions to improve profile completion and describe how you would test their effectiveness.
4. What kinds of data points or user behaviors would you analyze to understand why some users don’t complete their profiles?
5. Which statistical or machine learning methods could help predict users at risk of not completing their profiles, and how would you use these predictions?
6. Once you’ve implemented changes to improve profile completion, how do you measure success and ensure improvements are sustained over time?