The network effect occurs when the value of a company's service increases as more people use the service. For example, millions of buyers and sellers on Mercado Libre give the company an advantage over other online marketplaces. The more sellers there are on
$MELI, the more likely buyers are to find what they're looking for at a decent price. The more buyers there are, the easier it is to sell things.
According to a Morningstar Research, Network Effect is the rarest of the moats, but also companies with this moat have registered higher ROIC, ROE and Net Margin over time
Another companies with this moat could be
$ABNB $AMZN $FB
$V