What is the purpose of measuring the overall level of prices in the economy?

Question

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Measuring the overall level of prices in the economy, often through the Consumer Price Index (CPI), allows for comparison of dollar figures from different points in time. This is important for understanding inflation and the changing value of money over time. While measuring overall prices may have some indirect impact on measuring GDP or helping consumers prepare for future prices, these are not the core purposes of the measurement. Similarly, measuring overall prices may provide some insight into the value of the dollar, but this is not the primary purpose.

What Is the Purpose of Measuring the Overall Level of Prices