Fiscal policy refers to the changes made by the government in its revenue and expenditure. In other words, it is the use of government spending and taxation to influence the economy. The government can increase or decrease its spending, or adjust tax rates, to stimulate or slow down economic growth, manage inflation, or address other economic issues. By doing so, fiscal policy affects the overall demand and supply of goods and services, which can impact the money supply, but it is not directly related to changes in the money supply or the regulation of imports and exports.