The Shifts Supply Curve is a concept in economics that explains how a change in the quantity supplied of a good or service is determined by a number of different factors. In general, it can be said that when things become more expensive (due to shifts in the demand curve) or when additional resources are available (due to an increase in production capacity), this will cause the supply of goods and services to move up the curve. Conversely, if prices fall or production capacity decreases, then supply will move down the curve. Put simply, the Shifts Supply Curve shows us that changes in availability, cost and resource utilisation directly influence the amount of something that can be sold in the market.