Design & media

Viral Marketing Playbook

Try it

You bolted a referral program onto your product and... nothing. People don't share because you asked — they share when the loop is designed into the moment t...

What it does

You bolted a referral program onto your product and... nothing. People don't share because you asked — they share when the loop is designed into the moment they get value. This playbook is the mechanics of virality, with the math to tell whether a loop will actually compound. What's inside: • Viral loop anatomy — the mechanics behind referral, invite, and content loops • K-factor math — calculate your viral coefficient and model growth scenarios before building • Incentive design — what to offer referrers and referred users (and what quietly kills the loop) • Share triggers — the moments in the user journey where sharing feels natural, not begged • Case studies — how Dropbox, Notion, and Loom built their viral engines 🇨🇳 病毒增长设计 — 病毒循环解剖+K因子计算+激励设计+分享触发时机,含 Dropbox/Notion/Loom 拆解。 🇯🇵 バイラル設計 — バイラルループ解剖、K係数計算、インセンティブ設計、シェアトリガー。Dropbox/Notion/Loom事例。 🇰🇷 바이럴 설계 — 바이럴 루프 해부, K-팩터 계산, 인센티브 설계, 공유 트리거. Dropbox/Notion/Loom 사례. Triggers: "viral marketing" | "viral loop" | "referral program" | "referral marketing" | "K-factor" | "viral coefficient" | "invite system" | "share mechanics" | "network effects" | "growth loop" | "word of mouth" | "病毒营销" | "病毒循环" | "裂变" | "推荐机制" | "バイラル" | "바이럴 마케팅"

The skill document

📦 Install

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 | English | 日本語 | 한국어

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

🔗 About the Author

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

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