| name | growth |
| description | Product growth and product-market fit. Use when:
- Testing if you have PMF
- Designing activation flows
- Thinking about retention
- Planning acquisition channels
|
Growth Principles
Product-Market Fit (PMF)
Sean Ellis Test
Ask users: "How would you feel if you could no longer use this product?"
- Very disappointed = Must-have user
- Somewhat disappointed = Nice-to-have
- Not disappointed = Not a fit
Threshold: 40%+ "Very disappointed" = Strong PMF
###快速验证
- Can move from 7% to 40% in 2 weeks
- Focus on must-have users, ignore "somewhat disappointed"
###PMF Signals
- Users spontaneously refer others
- Retention cohorts show healthy curves
- "Ah-ha" moment is clear and repeatable
Growth Funnel
Acquisition → Activation → Retention → Referral
(Get) (First) (Keep) (Spread)
1. Acquisition
- How do users discover you?
- Channels: Organic, Paid, Referral, Partnership
2. Activation
- First-time user experience
- Key: Speed to value — get them to the "ah-ha" moment fast
- Set correct expectations before they start
3. Retention
- Do users keep coming back?
- Measure: Day 1/7/30 retention cohorts
4. Referral
- Do users tell others?
- Viral coefficient > 1 = Organic growth engine
Growth Levers
| Lever | Description |
|---|
| Onboarding | First-time experience quality |
| Pricing | Perceived value vs cost |
| Activation | Time to first value |
| Retention | Habit formation |
| Referral | Social proof loops |
North Star Metric
Find the one metric that represents customer value:
- Notion: Weekly active contributors
- Facebook: Daily active users
- Slack: Messages sent
Test: "If we improve X, does the business grow?"
Sources
- Sean Ellis (Hacking Growth)
- Brian Balfour
- Lenny's Podcast growth episodes
