Answer: GDP is a measure of the value of goods and services that the country produces in a period, in agriculture, industry and services. Measuring the economic activity and wealth level of a region. The more you produce, the more you are consuming, investing, and selling.
CPI are the consumer price indices calculated by the US Bureau of Labor Statistics. Calculate different CPI, which are used for different things.
Unemployment measure the unemployment rate of a country, for example. It is doing dividing the number of unemployed individuals by the number of currently employed people.