Following the money means looking at where money is moving. This can help you figure out what people are doing with their money and how it affects different parts of the economy. For example, if you want to know where people are spending their money, you could look at how much money businesses are receiving from customers, or how much money people are investing in the stock market. By following the money, you can get an idea of what people are doing with their money and how it is affecting the economy.