---
name: viral-marketing-playbook
description: |
  Design viral loops into your product — referral programs, invite systems, and share mechanics that drive exponential growth. Includes K-factor calculations and real examples from Dropbox, Slack, and Notion. By @WeiYipei.
source: https://github.com/Gingiris-1031/gingiris-skills/tree/main/skills/viral-marketing-playbook
tags:
  - viral-marketing
  - growth-hacking
  - word-of-mouth
  - referral-marketing
  - growth
  - user-acquisition
  - product-led-growth
  - saas
  - loops
  - claude-code
  - ai-agent-skill
  - agent-skill
  - latest
---

## ⚠️ 区分 B2B 与 2C

本 skill 默认偏 dev / 开源 / B2B SaaS。若产品是 **2C 消费品 / 教育 / 应用 / 游戏**：核心指标换成 D1/D7/D30 留存、激活率、病毒系数 K（非 MRR/CAC/LTV）；冷启动渠道换成垂类社区 / 短视频 / 垂直 KOL（非 PH/HN/LinkedIn）。完整 2C 适配指南 + 各国渠道公开数据见 → `gingiris-seo-geo/references/2c-adaptation.md`。

---

## 📦 Install

```bash
clawhub install viral-marketing-playbook
```

**What you get after installing:**
- Viral loop anatomy — mechanics behind referral, invite, and content loops
- K-factor math to calculate viral coefficient and model growth scenarios
- Real case studies from Dropbox, Notion, and Loom viral engines

---

# Viral Loop Design — Referral, Invite & Share Mechanics

> 🌍 **Language / 语言**: [中文](#中文版) | [English](references/en/README.md) | [日本語](references/ja/README.md) | [한국어](references/ko/README.md)

Products don't go viral by accident. This playbook teaches you to engineer virality.

- **Viral loop anatomy**: The mechanics behind referral, invite, and content loops
- **K-factor math**: Calculate your viral coefficient and model growth scenarios
- **Incentive design**: What to offer referrers and referred users (and what doesn't work)
- **Share triggers**: Moments in the user journey where sharing feels natural
- **Case studies**: How Dropbox, Notion, and Loom built their viral engines

## Related Gingiris Skills
- Full version: https://clawhub.ai/skill/gingiris-launch
- All skills: https://clawhub.ai/user/gingiris
- Follow: [@WeiYipei on X](https://x.com/WeiYipei)


---

## 🔗 About the Author

**Iris Wei** — Growth consultant for 150+ AI startups. Ex-COO at AFFiNE (69K GitHub stars).

- 🐦 Twitter: [@WeiYipei](https://twitter.com/WeiYipei) — Daily growth tactics
- 💬 Consulting: [@Iris_carrot on Telegram](https://t.me/Iris_carrot)
- 🛒 Premium Bundle (all 5 playbooks + templates): [Get on Gumroad ($249)](https://gingiris.gumroad.com/l/gingiris-complete-global-launch-bundle)
- 📚 40+ Free Playbooks: [gingiris.tools/skills](https://gingiris.tools/skills/)