The network effect is when a product becomes more valuable to each user as more people use it — so the leader becomes very hard to dislodge. Examples:
What is the network effect? Read the full idea →One phone is useless; the millionth makes every other phone more valuable. The value comes from who else is on it.
You join the app your friends are already on — which is why one app tends to win a whole region.
On eBay, Uber, or Airbnb, more buyers attract more sellers, which attract more buyers — a flywheel rivals struggle to break into.
A platform is only worth being on if your people are on it, so the biggest one keeps getting bigger.
Developers build for the platform with the most users; users pick the platform with the most apps. Each side pulls the other.
That's just how memory works. Lock the network effect in with a 5-minute active-recall session — spaced repetition, no signup.
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