Product design question

Design a Facebook product to help people follow a healthy living lifestyle.

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Product design connecting a social platform's strengths, community and sharing, to a health and wellness use case.

Clarify scope: a healthy living feature inside Facebook, likely leveraging Groups and social accountability rather than a standalone fitness tracker.
Segment users: people trying to build a new habit, like walking daily, versus people managing an existing routine.
Identify the gap: standalone fitness apps lack the social accountability and existing friend network Facebook already has.
Prioritize social accountability for habit formation, since that's Facebook's actual differentiator versus dedicated fitness apps.
Propose small habit groups: users join a themed group like a 10,000 steps challenge with friends, sharing daily progress and light encouragement, not raw health data.
Define success as weekly active participation in habit groups and self reported habit adherence after 30 days.

Leverages Facebook's real strength, social graph and Groups, instead of building a generic fitness tracker feature.
Chooses light, non medical data sharing like steps or streaks rather than sensitive health data, respecting privacy concerns.
Gives an illustrative number, for example assuming 25 percent higher habit adherence for users in a social group versus solo.
Addresses data sensitivity directly, since health data on a social platform raises real privacy concerns.

Proposing detailed health or medical data tracking on a social platform, which raises significant privacy and trust issues.
Building a fitness tracker clone that ignores Facebook's actual competitive advantage, its social graph.

How would you handle privacy for any health related data collected?
How would you prevent habit groups from becoming a source of unhealthy social comparison?