Welcome to your interview.
The question is on your right: Model Impact of Zero-Commission. 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 competitor launches a zero-commission campaign in a key European market, how would you model the potential impact on Booking.com marketplace dynamics?