Product design question

You're a PM at Facebook. Design a product to increase engagement in a local community.

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

Whether you can turn a vague engagement goal into a specific user segment, pain point, and testable solution.

Clarify local community: a neighborhood on Facebook Groups, Marketplace, and Events, and define engagement as posts, RSVPs, or DAU within it.
Segment users into long-time residents, newcomers, and local business owners, and find whose engagement is lowest today.
Surface pain points: newcomers do not know which groups exist, residents see low-relevance content, businesses struggle to reach nearby customers.
Prioritize the newcomer discovery problem, since it blocks the network effect that makes local groups useful in the first place.
Propose a New to Your Neighborhood flow that surfaces nearby active groups, events, and businesses based on location.
Define success metrics: local group joins per new resident, week four posting rate, and RSVP to attendance ratio.

Picks a specific underserved segment, new residents in their first 90 days, instead of everyone in the community.
Builds on Facebook's existing assets, Groups, Events, and Marketplace, rather than inventing an unrelated standalone feature.
Uses an illustrative number, assuming only 20 percent of new residents join a local group in month one today.
Names a guardrail metric, like reported content or spam, so engagement growth is not just noise.

Designing a generic engagement feature that could fit any product rather than something specific to local community.
Skipping segmentation and treating all residents as having the same underlying problem.

How would you tell meaningful engagement apart from vanity activity?
What would you change if local business owners turned out to be the least engaged group?