Define the user goal, identify where friction or unmet needs exist, prioritize one improvement by impact and feasibility, and describe how you would measure success.

Structure: (1) Pick a user segment and their job-to-be-done. (2) Walk the user journey and identify pain points. (3) Brainstorm solutions. (4) Prioritize: impact on north star × feasibility × strategic fit. (5) Define success metrics. Interviewers look for structured thinking, not the "right" answer - show you can move from user insight to measurable hypothesis rather than just listing features.