The Demand side's a term used in economics to refer to a number of things: The demand element of a supply and demand partial equilibrium diagram, in microeconomics The aggregate demand in an economy, in macroeconomics Economic policy actions which are designed to affect aggregate demand. Demand-side learning referring to the incentive to learn how to use and modify free software as opposed to buying conventional software. The term's also used broadly to distinguish supply-side economics fro… (More on Demand-side)