Investigating a 20% Increase in Facebook Event RSVPs: Real, Healthy or Artifact?
Company: Meta
Role: Product Manager
Category: Analytics & Experimentation
Difficulty: medium
Interview Round: Other
Suppose you are the product manager for Facebook Events at Meta, and the number of RSVPs on events has risen by 20%. Explain what you would do: how you would confirm the change is real, find what is driving it, decide whether it is good for guests and hosts, and choose the next steps.
```hint Treat a rise like a drop
An unexpected increase deserves the same scrutiny as a decline. Separate three questions: is the number real, where exactly did it come from, and are the extra RSVPs turning into value for the people on both sides of an event?
```
### Clarifying Questions
- Over what period is the 20% measured, and against what baseline: the previous week, the same period last year, or a forecast?
- Does "RSVP" include both "Going" and "Interested" responses, and is it a count of responses or of unique people responding?
- Did the increase arrive as a sudden step or build gradually, and is it global or concentrated in particular regions, platforms or event types?
- Are any launches, experiments, ranking changes or notification changes known to have shipped around that time?
### What a Strong Answer Covers
- Pinning down the metric definition, time window and baseline before diagnosing anything.
- Ruling out logging, definition and spam explanations before looking for product or market causes.
- A decomposition and segmentation of RSVPs that localizes where the extra volume comes from.
- Internal and external hypotheses checked in a sensible order, using the shape of the change as evidence.
- Judging whether the rise is healthy through downstream and counter metrics for guests and hosts, and ending with a concrete decision.
### Follow-up Questions
- Suppose the whole increase comes from a redesign that made the RSVP button more prominent in Feed. How do you decide whether to keep it?
- How would you measure whether more RSVPs led to more people actually attending events?
- Event creation is flat while RSVPs rose. What does that tell you, and what would you check next?
Overview: A Meta product execution case about a 20% rise in RSVPs on Facebook Events. It tests how you confirm a metric movement is real, decompose and segment it to find the driver, weigh internal against external causes, judge through downstream metrics whether the gain reflects real attendance, and decide what to do next.