Techopedia explains
Monetary Easing
Monetary easing is meant to spur a nations economy into growth mode by making capital readily available. However, monetary easing can also become a catalyst for inflation. When a nation floods its system with easy credit (via low interest rates) or floods the market with currency, it is hoping that the economy will expand. If the economy expands and monetary policy tightened up again, then the temporary inflation risk was worthwhile from an economy standpoint. If, however, the monetary easing fails, the inflation that follows may leave the nation worse off than if no action had been taken at all.