1. 1. VIRAL GROWTH Nice, July 20, 2015 Andreas Ehn Twitter: @ehn
2. 2. Sign up Share
3. 3. Sign up Share See Desire to share
4. 4. Sign up Share See Desire to share On-ramp
5. 5. Sign up Share See Desire to share On-ramp Branching factor
6. 6. Given that I get a new customer today, how many new customers will they bring in over the next p days? Viral factor K = IC Cycle time p
7. 7. K = 0.5 1 + 0.5 + 0.25 + 0.125 + = 2 { p
8. 8. K = 1.1 1 + 1.1 + 1.21 + 1.331 + =
9. 9. U(t) =U(0) K t p +1 1 K 1 K = I C
10. 10. 0 5 10 15 20 0 50 100 150 200 K = 1.2 K = 1.1 K = 0.5
11. 11. 0 5 10 15 20 0 100 200 300 400 500 p = 0.5 p = 1 p = 2
12. 12. Maximize viral factor K = IC Maximize no of invites I Maximize conversion rate C Minimize cycle time p
13. 13. Win win win
14. 14. Sign up to redeem Give gift card Receive gift card See birthday
15. 15. Sign up to redeem Give gift card Receive gift card (expires in 30 days) See birthday Featured by retailers Every day is someones birthday
16. 16. Have content/product people want to share Make it easy to invite a lot of friends Make it easy and desirable to act on invites Make it easy and fast to sign up and start inviting more users Measure everything, iterate fast
17. 17. THANK YOU Andreas Ehn Twitter: @ehn