What does the purchasing power of a money mean? How can it be measured?

What will be an ideal response?

The purchasing power of a money is also known as its real value and indicates the amount of goods and services that can be purchased with a given amount of the money. We measure purchasing power by first calculating the price level, which is a weighted average of the prices of the goods and services that people consume. The weights in the price level reflect the shares of these goods and services in the consumption bundle of a typical individual. The purchasing power of the money is then found by taking the reciprocal of the price level. The units of the price level are an amount of money per consumption bundle, and the units of purchasing power are consumption bundles per unit of money.