Welcome to your interview.
The question is on your right: Investigating Market Share Decline. 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 major brand like Purina is experiencing a decline in market share despite increased digital ad spend, how would you investigate the issue at Nestlé S.A?