Welcome to your interview.
The question is on your right: Test New Feature Engagement Impact. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
You're working on a digital product team that plans to launch a new feature and wants to know if it actually improves how users engage with the product. The team wants a disciplined way to measure impact before rolling the feature out broadly.
How would you design an experiment to test the impact of a new feature on user engagement?