Your question is Discovery UI Metrics and Guardrails. 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).
You work on a streaming product and are testing a UI change that affects discovery. The team wants to know whether the new experience improves how people find something to watch without harming other parts of the product.
What metrics would you use as primary metrics and guardrails for this experiment, and how would you define them? Explain how you would judge success before launch and what would make you avoid shipping.