Why is a low level of inflation desirable in an economy and why is deflation not desirable?

A low level of inflation is desirable because it encourages consumer spending and investment, as people are more likely to make purchases when they expect prices to rise gradually. It also helps to reduce the real burden of debt, making it easier for borrowers to repay loans. Conversely, deflation is not desirable because it can lead to decreased consumer spending, as people may delay purchases in anticipation of lower prices, resulting in reduced economic activity and higher unemployment. Additionally, deflation increases the real value of debt, making it harder for borrowers to meet their obligations.