Welcome to your interview.
The question is on your right: Diagnose a Conversion Drop. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
If a digital marketing manager asks you why a specific Santander Holdings USA campaign's conversion rate dropped by 15% last week, what steps would you take to diagnose the issue?