Structure your answer as: Problem identified, approach taken, cross-functional collaboration, launch outcome, and metrics.
Strong answers show end-to-end ownership: identifying the opportunity, defining requirements, working with engineering and design, making trade-offs, launching, and measuring results. Look for specific metrics (adoption, revenue, retention) rather than vague claims of success.
Establishes baseline PM experience. Watch for whether they describe their role specifically or take credit for team efforts. Ask "What would you do differently?" to assess self-reflection.