Your question is North Star Metric Definition. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How would you define a north star metric for this product?
Explain how you would identify the product's core customer value, choose one primary metric, and distinguish it from supporting input and guardrail metrics. Describe how you would validate that the metric is actionable, resistant to gaming, and connected to long-term business outcomes.