1. VIRAL GROWTH Nice, July 20, 2015 Andreas Ehn Twitter:
@ehn
2. Sign up Share
3. Sign up Share See Desire to share
4. Sign up Share See Desire to share On-ramp
5. Sign up Share See Desire to share On-ramp Branching
factor
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. K = 0.5 1 + 0.5 + 0.25 + 0.125 + = 2 { p
8. K = 1.1 1 + 1.1 + 1.21 + 1.331 + =
9. U(t) =U(0) K t p +1 1 K 1 K = I C
10. 0 5 10 15 20 0 50 100 150 200 K = 1.2 K = 1.1 K = 0.5
11. 0 5 10 15 20 0 100 200 300 400 500 p = 0.5 p = 1 p = 2
12. Maximize viral factor K = IC Maximize no of invites I
Maximize conversion rate C Minimize cycle time p
13. Win win win
14. Sign up to redeem Give gift card Receive gift card See
birthday
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. 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