GMV is the marketplace-business metric — what Amazon, Flipkart, Meesho report. Different from net revenue (after returns, refunds, commissions). For an SMB selling on a marketplace, your GMV = your sales × your average sale value.
GMV is useful for tracking growth direction, cohort behavior, and category trends. Never the metric to optimize for valuation alone — high GMV with terrible take-rate isn't profitable.
For Indian D2C brands using marketplaces, GMV at platform-level is what Amazon/Flipkart show; net revenue (GMV - returns - commissions - shipping) is what hits your books.