Product design question
If YouTube wanted to personalize the Home feed for casual viewers, what approach would you take?
- YouTube
- Product design
- Medium
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What this question tests
Ability to segment users, casual versus power viewers, and design personalization specific to that segment's behavior.
How to approach it
- Define casual viewer: low session frequency, broad taste, less likely to subscribe or search.
- Identify their pain point: Home defaults toward heavy viewer signals like subscriptions and deep watch history that casual viewers lack.
- Propose leaning on lighter signals for this segment: trending content, short sessions, and category level interest.
- Consider using Shorts as a low commitment discovery layer that feeds signal back into Home recommendations.
- Define success: session frequency or return visit rate among low activity viewers, not just watch time.
What a strong answer includes
- Grounds personalization in what casual viewers actually generate: sparse but real signals like trending taps and short sessions.
- Proposes Shorts as a lightweight signal gathering mechanism specifically for users without deep watch history.
- Uses a segment appropriate metric, return visit rate, instead of watch time which favors already engaged users.
Common mistakes
- Applying the same recommendation logic used for power users without adjusting for sparse signal.
- Optimizing for watch time, which rewards existing heavy users, not the casual segment the question asks about.
Likely follow-up questions
- How would you know if a viewer counts as casual without them telling you?
- What would you A/B test first?
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More questions from YouTube
Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 4: Discovery and strategy for AI products
- Chapter 7: AI UX and human oversight: design for a system that is wrong sometimes
- Chapter 14: Get the job: the AI PM interview loop