# Growth

> Product growth and product-market fit. Use when: - Testing if you have PMF - Designing activation flows - Thinking about retention - Planning acquisition channels

- Skill: `huangqianqian120/growth` (Agent Skill)
- Install (CLI): `npx skillmds@latest add huangqianqian120/growth`
- Raw SKILL.md: https://api.skillmd.com/api/skills/huangqianqian120/growth/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Marketing & Growth
- Author: huangqianqian120 (https://skillmd.com/u/huangqianqian120)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/huangqianqian120/growth

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# 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?"

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## Sources

- Sean Ellis (Hacking Growth)
- Brian Balfour
- Lenny's Podcast growth episodes