Defining the Goal and Success Metrics for Facebook Life Events
Company: Meta
Role: Product Manager
Category: Analytics & Experimentation
Difficulty: medium
Interview Round: Other
You are a product manager at Facebook and are asked how you would define the goal for Life Events, the feature that lets people mark milestones such as a new job, a move, an engagement or a new baby on their profile and share them with friends. Set the goal, then explain how you would measure progress toward it.
```hint Ask why the feature exists
Think about who gains when someone marks a milestone: the person posting, the friends who see it, and the platform. A goal that serves only one of them will pull the feature in the wrong direction.
```
### Clarifying Questions
- Is the goal for the whole Life Events feature, or for one surface such as the creation flow or how milestones appear in friends' Feeds?
- What time frame is the goal for, for example the next half-year planning cycle?
- Should the goal cover sensitive milestones, such as a loss or a breakup, as well as happy ones?
- Is something prompting this, such as falling usage, or is it a routine planning exercise?
### What a Strong Answer Covers
- A goal derived from the company's mission and from what the feature does for posters and their friends, rather than a metric chosen first.
- One primary success metric that captures meaningful interaction around milestones, with a precise definition.
- Supporting metrics across the path from creation to friend response, segmented by milestone type and audience.
- Guardrails for privacy, negative feedback and sensitive milestones, and an explicit position on whether time spent or ad impressions belong in the goal.
- How a concrete target would be set from a baseline over a stated time frame.
### Follow-up Questions
- The number of Life Events created rises after a new creation prompt ships, but comments per milestone fall. What might have happened, and what would you do?
- How should your metrics treat a post announcing a death in the family differently from a post about a promotion?
- Would you include a revenue metric in this goal? Defend your answer.
Overview: A product metrics interview question about defining the goal for Facebook Life Events, the feature for sharing personal milestones with friends. It tests linking a goal to the mission and user value, choosing a primary success metric, building supporting and guardrail metrics, and setting a target from a baseline.