Your question is Designing a Conversion A/B Test. 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 design an A/B test to measure whether a new product feature improves conversion rate?
Explain how you would define the hypothesis, select the primary metric and guardrails, choose the randomization unit, and determine the required sample size. State the assumptions you would make for an illustrative power calculation, then describe the analysis plan, key risks, and ship or do-not-ship rule.