Your question is Marketing Campaign Effectiveness. 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 assess the effectiveness of a marketing campaign using data?
Keep your answer focused on an experiment design, not a generic dashboard review. Define the hypothesis, the primary success metric, guardrails, sample size, and how you would avoid common testing mistakes.
