What are Network effects?
Network effects occur when the value of a product, behavior, or convention increases as more people adopt it. Each new adopter makes adoption more valuable for everyone already in the network, creating a self-reinforcing cycle.
How it works
Network effects can be direct (each new phone user makes the phone network more valuable to existing users) or indirect (each new smartphone user attracts more app developers, which attracts more users). Network effects explain why markets often tip toward monopoly (once one network gets ahead, it is increasingly costly to use the alternative), why behavior change can accelerate suddenly after a tipping point (each new adopter reduces the social cost of adoption for the next), and why some technologies persist despite being inferior (QWERTY keyboard layout).
Applied example
A messaging app with 100 users in your social circle is more valuable than a technically superior app used by only 5 people you know. The social network effect outweighs feature quality, explaining why people stick with dominant platforms.
Why it matters
Network effects explain why behavior change can exhibit sudden tipping points: once enough people in a social network adopt a behavior, the social cost of non-adoption exceeds the cost of change.
