Exponent, the leading interview preparation platform, brings together product marketing professionals from Khan Academy and LinkedIn for a live mock interview session focused on one of the most deceptively simple PMM questions: "Why product marketing?" This session goes far beyond the surface-level answer, revealing the depth of thought that top interviewers expect when they ask about career motivation. The mock interview format allows viewers to see both the candidate's thought process and the interviewer's real-time evaluation, including what scored well and what fell flat. Exponent's coach breaks down the anatomy of a compelling PMM narrative --- connecting personal experience to product passion, demonstrating understanding of the role beyond marketing, and showing genuine excitement for the craft. It's a masterclass in PMM storytelling that's equally valuable for active job seekers and anyone looking to articulate their professional purpose more clearly.