Understand how products grow through viral loops, network effects, and retention
Chapter 1 · Start here
Growth Loops: Products That Spread Themselves
Understand how products create self-reinforcing cycles where users bring more users
Chapter 2 · Start here
Viral Coefficient: K-Factor Math
Learn the simple math behind viral growth and why k>1 means exponential expansion
Chapter 3 · Start here
Referral Programs: Dropbox Strategy
See how Dropbox grew 3900% in 15 months by giving users a reason to invite friends
Chapter 4 · Start here
A/B Testing: Let Data Decide
Learn how to test multiple versions and let user behavior determine the winner
Chapter 5 · Start here
Conversion Funnels: Where Users Drop
Understand how to identify and fix the steps where potential customers abandon your product
Chapter 6 · Start here
Retention Vs Acquisition: What Matters More
Discover why keeping existing users is often more valuable than acquiring new ones
Chapter 7 · Start here
Network Effects: Value From Users
Learn why some products become more valuable as more people use them, creating winner-take-all markets