Your question is Diagnosing an Underperforming Campaign. 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).
Tell me about a time a marketing campaign underperformed against expectations. How did you diagnose what went wrong, what data did you use, and what did you recommend for future campaigns?