This document summarizes Porter's generic competitive strategies framework, which identifies three strategies for achieving competitive advantage: cost leadership, differentiation, and focus (specialization). Cost leadership involves having the lowest costs, differentiation involves being unique in the industry, and focus involves targeting a narrow market segment. Examples of companies using each strategy are provided, along with criticisms of Porter's framework noting that companies can use hybrid strategies. The document concludes by introducing the blue ocean strategy as an alternative to Porter's framework.