GMV is the headline volume metric for marketplaces and payment platforms. It captures what users transacted, not what the platform earned. Net revenue is GMV multiplied by take rate, minus payment processing and fulfillment costs.
GMV is useful for showing scale and growth; it is not, by itself, a measure of business health. A marketplace with $1B GMV at a 1% take rate is structurally weaker than one with $200M GMV at a 15% take rate. Investors discount GMV-only narratives.