Strategy question
An engineer suggests showing suggested Buy/Sell Groups on users' newsfeed instead of the People You May Know section. How do you determine if that is a good idea or not?
- Meta
- Strategy
- Medium
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What this question tests
Ability to evaluate a feature idea against existing surfaces using data and user value, not just gut feel.
How to approach it
- Clarify the engineer's premise: is Buy/Sell Groups replacing PYMK entirely, or just competing for the same feed slot.
- Define the user need PYMK serves (growing your network) versus what Buy/Sell serves (local commerce discovery).
- Look at engagement data for both surfaces, such as click through rate, dwell time, and downstream actions like messages sent.
- Consider the ecosystem cost: PYMK drives friend growth, which compounds network effects Buy/Sell does not.
- Propose testing both via an A/B experiment that measures newsfeed engagement, session length, and marketplace transaction rate.
- State that the decision should follow the experiment result, not the engineer's intuition alone.
What a strong answer includes
- Distinguishes the two features' jobs to be done instead of treating them as interchangeable feed content.
- Proposes a specific test design, holding out a control group and measuring both short term engagement and long term retention.
- Flags that PYMK protects network growth, a leading indicator for retention, which a short term engagement lift could obscure.
- Uses an illustrative number, e.g. assumes a 3 percent CTR gap would not justify losing PYMK's compounding effect.
Common mistakes
- Answering purely on intuition instead of proposing a way to measure the tradeoff.
- Missing that PYMK has downstream effects on network growth that a single engagement metric will not capture.
- Treating this as a binary swap instead of considering a hybrid or personalized placement.
Likely follow-up questions
- What would you measure to catch a hidden long term cost?
- How would you personalize this instead of a blanket swap?
- What sample size or test duration would you need?
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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 9: Prove it paid off: outcomes, economics, and pricing
- Chapter 14: Get the job: the AI PM interview loop