Monetary policy uses tools like interest rates and money supply to influence economic outcomes like growth, inflation, exchange rates, and unemployment. The objectives of monetary policy are price stability, credit availability, exchange rate stability, full employment, and high economic growth. The tools available to central banks include open market operations, changing reserve requirements, and setting bank interest rates like the discount rate. How monetary policy works is by influencing the cost of borrowing - lower rates encourage more spending, saving, and investment in assets like property and stocks.