Explaining three products you admire and how you would judge their success on every front
Company: Twilio
Role: Product Manager
Category: Analytics & Experimentation
Difficulty: medium
Interview Round: Other
Name your top three favorite products, then explain how you would measure their success, covering every area where success shows up.
### Clarifying Questions
- Should I build a measurement plan for all three products, or go deep on one and sketch the other two?
- Do you want a reason for each pick, or should I keep the list short and spend the time on measurement?
- Can one of them be this company's own product, or should I choose products from elsewhere?
### Part 1 — Your three products
List your three favorite products and, for each, who it serves and the need it meets.
```hint Pick for contrast
Choose products that differ in who pays and how they grow, so the measurement part has something different to say about each one.
```
#### What This Part Should Cover
- Products the candidate actually uses and can discuss in depth
- For each one, the user, the need and the goal the product is pursuing, since that goal drives its metrics
### Part 2 — Measuring success
How would you measure whether these products are succeeding? Cover all the areas in which a product can succeed or fail.
```hint Start from the goal
Write each product's goal in one sentence first, then go area by area and ask which number would show progress in each.
```
#### What This Part Should Cover
- A north-star metric for each product, tied to its goal, with the reason for choosing it
- A systematic sweep of the areas where each product can succeed or fail, with metrics for each
- Guardrails and the tensions between metrics
- How each product's business model changes what is measured
### What a Strong Answer Covers
- Picks that give the measurement part material to work with, explained through users and needs
- Metrics that come from each product's goal rather than a generic checklist repeated three times
- Breadth across areas, with depth on the few metrics that matter most
- Leading versus lagging indicators and how the metrics would actually be collected
- A clear structure and good use of time across three products
### Follow-up Questions
- If you could track only one metric for one of your products, which would it be, and what would it miss?
- Which of your three products is hardest to measure, and why?
- One product's north star keeps rising while its satisfaction scores fall. How would you work out what is happening?
Overview: A Twilio product manager question that asks you to name your three favorite products and explain how you would measure their success across every relevant area. It tests product taste, tying metrics to each product's goal and business model, breadth of coverage from adoption to quality and trust, and guardrails.