This document discusses competitive strategies for different types of companies in a market. It covers strategies for market leaders to defend their position such as expanding the total market, defending market share, and expanding market share. Strategies are provided for market challengers to attack leaders or other competitors through frontal, flank, encirclement, or bypass attacks. The document also discusses strategies for market followers to hold customers and win new ones, and strategies for market nichers to create, expand, and protect niches. Competitive forces and how to analyze competitors is also summarized.