Virality: The K-Factor Math
THE BRUTAL REALITY: VIRALITY IS NOT LUCK
"Going viral" is not about a funny video or a lucky tweet. It is a cold, mathematical engine.
The Conflict: Most people try to "buy" virality with referral bonuses. This is expensive and temporary.
The Truth: A product is truly viral only when every new user brings in more than one *other* user for free.
The Fix: Focus on the "K-Factor." If K > 1, you have exponential, unstoppable growth.
1. INHERENT VS. INCENTIVIZED VIRALITY
Inherent virality is when the product *only works* if you invite others (e.g., WhatsApp, Zoom). Incentivized is "Invite a friend for $10." Inherent virality is 100x more powerful because it's built into the core utility.
2. VIRAL CYCLE TIME
How long does it take for a user to invite a friend? If it takes 2 days, you are a rocket ship. If it takes 2 months, you are a turtle. Your goal is to shorten the "Cycle Time" by making the invite the default, easiest action.
SMART WORDS
K-FACTOR
The "Contagion." The number of additional users each existing user generates.
VIRAL CYCLE TIME
The "Speed." The time it takes for a user to complete the invite loop.
INHERENT VIRALITY
The "DNA." Virality that is a fundamental part of the product's function.
TACTICAL DIRECTIVES
1. Calculate K: (Total Invites Sent x Conversion Rate) / Total Users. Know your number.
2. Shorten the Cycle: Put the "Invite" prompt on the screen *before* the user even finishes onboarding.
3. Shared Value: Make the invite about the *friend's* immediate benefit, not the *user's* reward.
Launch Simulation
"Test your tactical judgment against a complex market situation."