The document discusses diversification strategy and its relationship to firm performance. It defines different types of diversification, like related and unrelated diversification. While diversification can help firms grow and spread risk, creating synergies between different business is difficult to achieve in practice. Empirical evidence on the relationship between diversification and performance is mixed, with some studies finding diversified firms perform worse. The document examines different motives for diversification and argues that growth alone does not create shareholder value unless synergies exist. It also outlines Porter's tests that diversification must meet to benefit shareholders.