How do changes in the GDP deflator accurately reflect changes in the prices of goods and services?

Changes in the GDP deflator accurately reflect changes in the prices of goods and services by measuring the overall price level of the economy. The GDP deflator accounts for inflation or deflation by comparing the current prices of goods and services to a base year. When the GDP deflator increases, it indicates that prices have risen, and when it decreases, it suggests that prices have fallen. This helps economists and policymakers understand how inflation or deflation is impacting the economy.