Monetary policy refers to policies aimed at regulating money supply and interest rates to achieve objectives like economic growth, price stability, and full employment. The Reserve Bank of India formulates and implements monetary policy by influencing money supply and credit creation. While monetary policy can help economic goals, it faces limitations in developing economies from non-monetized sectors, unorganized financial markets, excess liquidity, and lack of coordination with fiscal policy. Overall, monetary policy plays an important role in India's economy despite these challenges.