How does the GDP deflator reflect changes in the overall price level of goods and services within a country's economy?

The GDP deflator is a measure that reflects changes in the overall price level of goods and services within a country's economy. It compares the current prices of all goods and services produced in the economy to a base year. By tracking changes in the GDP deflator over time, we can see how prices have changed and how inflation or deflation has impacted the economy.