The answer is "allocative efficiency".
Allocative efficiency is a condition of the economy in which good produced speaks to buyer inclinations; specifically, every good or service is delivered up to the point where the last unit gives a negligible advantage to buyers equivalent to the peripheral cost of producing. Allocative efficiency happens where cost is equivalent to marginal cost that is ( P=MC), in light of the fact that cost is society's proportion of relative worth of an item at the margin or its marginal benefit.