Welcome to your interview.
The question is on your right: Optimizing Channel ROI. 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.
How would you analyze and optimize channel ROI across multiple traffic sources and verticals at Quinstreet?