For this question, it's clearly important to do your research. The Mirakl website includes many white papers and analyst reports that highlight the main elements of the marketplace model. Also, check out the Mirakl Youtube channel for e.g. talks by founder Adrien Nussenbaum and interviews with clients. I even found and read a copy of a book written by the founders "Marketplace: the future of e-commerce by Philippe Corrot and Adrien Nussenbaum". In answering this question, I didn't initially highlight the specifics of the marketplace model for B2B customers. But I felt I was able to explain this well after a follow-up question by the interviewer (e.g. need to support RFQs, negotiation tools, volume discounts, specialized pricing, etc.).