The document discusses the three main types of business valuation: 1) The asset approach values a business based on the assets and liabilities it would take to establish the same level of profitability. Not all assets/liabilities are always included. 2) The market approach values businesses based on research of similar businesses and their valuations, treating businesses like consumer products for sale. 3) The income approach studies a business's profitability if an investor invested time, money, and effort, to determine its value.