Metrics question
You are the product manager for Instagram stories. How would you measure success at launch?
- Meta
- Metrics
- Medium
Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.
Start a mock interview on this question · Mock interview from a job description
What this question tests
Whether you can define launch success metrics that match the actual goal of a new feature.
How to approach it
- Clarify the goal of Stories at launch: was it to increase daily engagement, or to counter Snapchat's growth among younger users.
- Define north star: daily active users of Stories as a share of Instagram's overall DAU.
- Add supporting metrics: stories created per user per day, and viewer completion rate through a story.
- Add a guardrail: no cannibalization of main feed posting or overall time spent.
- Segment by user type: younger users, since that was the core competitive target.
- Set an early success threshold and a timeframe, for example a target adoption rate within the first 90 days.
What a strong answer includes
- Chooses a north star tied to the actual strategic reason for building Stories, defending against Snapchat, not a vanity metric.
- Adds a specific guardrail, checking that main feed posting volume does not drop as Stories cannibalizes it.
- Segments success by younger users specifically, the group Instagram most needed to retain (common knowledge context).
Common mistakes
- Picking a generic metric like total app downloads, unrelated to Stories itself.
- No guardrail against cannibalizing existing feed engagement.
- Ignoring the competitive reason Stories was built in the first place.
Likely follow-up questions
- How would you know if Stories is cannibalizing regular feed posts rather than adding new engagement?
- What would you do if adoption is high but completion rate is low?
More metrics questions
- How would you measure the success of Facebook Likes?Meta · Metrics · Medium
- How would you measure improvements made to Facebook messenger?Meta · Metrics · Easy
- Imagine you are the PM in charge of Reactions on Facebook - the new way to interact with posts by using “love”, “haha”, “wow”, “sad”, and “angry” reactions. What would success look like in terms of number of non-like reactions per post at launch and how do you come up with this? Would this number differ by reaction? Why or why not?Meta · Metrics · Hard
- You launched a new signup flow to encourage new users to add more profile information. A/B test results indicate that the % of people that added more information increased by 8%. However, 7 day retention decreased by 2%. What do you do?Google · Metrics · Hard
- Define the metrics for YouTube search.Google · Metrics · Medium
- You are the PM of Instagram app. The MAU has been constant but DAU has declined. What will you do?Meta · Metrics · Medium
More questions from Meta
Learn the skill behind it
Chapters of the AI PM course that teach what this question tests.
- Chapter 9: Prove it paid off: outcomes, economics, and pricing
- Chapter 2: Data fluency: SQL, logs, and reading the truth yourself
- Chapter 14: Get the job: the AI PM interview loop