Money Supply is the measure of the country's money stock. M1 includes the most liquid resources: cash money in circulation, demand deposits, traveler's checks. M2 includes M1, time deposits (up to $100,000) and other high-liquidity savings. M3 includes M2 and large time deposits.
Figures of M1, M2 and M3 are informative. They show the weekly change in the money supply. The most significant of them is M2. They have practically no effect on the market.