Metrics question
Google Maps had a 10% drop in daily active users. What do you do?
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What this question tests
Structured root cause investigation for a meaningful but not catastrophic metric decline in a mature product.
How to approach it
- Confirm the metric definition and timeframe: which platform, region, and whether this is a sudden drop or a gradual trend.
- Rule out measurement issues first, such as a tracking pipeline change or a definition change in how DAU is counted.
- Segment by platform (iOS, Android, web), region, and user tenure (new versus long time users) to find where the drop concentrates.
- Check for a recent product change: a UI redesign, a permissions prompt change, or a bug affecting a specific device type.
- Check external factors: a competing app's feature launch, seasonal travel patterns, or an OS level change affecting location permissions.
- Propose next steps based on findings, and set a monitoring window to confirm whether the drop stabilizes, worsens, or recovers.
What a strong answer includes
- Starts by confirming data accuracy before jumping to hypotheses, appropriate discipline for a 10 percent drop, which is significant but not extreme.
- Segments by platform and user tenure, since a real world Maps drop could stem from something as specific as an iOS permissions change.
- Names a concrete, plausible cause, an OS level location permission change, showing real technical awareness of Maps' dependencies.
- Proposes a monitoring window to distinguish a one time dip from a sustained trend before overreacting with a major fix.
Common mistakes
- Jumping to a fix before segmenting the data to understand where and why the drop is concentrated.
- Ignoring platform level causes like OS permission changes, which are common real causes of Maps usage drops.
- No plan to monitor whether the drop is temporary or a sustained new trend.
Likely follow-up questions
- How would you distinguish a temporary dip from a sustained trend?
- What platform specific cause would you check first?
- How would seasonal travel patterns factor into your analysis?
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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