This essay examines the reasons behind the European Central Bank's (ECB) adoption of quantitative easing in 2015, a monetary policy tool used to stimulate economic growth. It highlights that the ECB implemented this unconventional policy, which involves purchasing government securities to lower interest rates and increase money supply, due to concerns about deflation and a struggling Eurozone economy. The essay details the ECB's €1.1 trillion program and how it aimed to raise bond prices, lower interest rates, and encourage spending by businesses and households. It also addresses the issue of wage stagnation and high debt levels in countries like Ireland, Greece, and Italy, emphasizing quantitative easing's role in managing inflation and deflation while promoting sustained economic growth. The essay concludes that quantitative easing is a vital tool for central banks to stimulate economies, particularly when facing deflationary pressures.