This document discusses strategies for market leaders to expand total market demand and defend market share. It outlines three ways to attract new customers: market penetration, new market segments, and geographical expansion. It also discusses two ways to increase usage: communicating advantages to increase frequency or amount of consumption, and identifying new applications. Finally, it discusses two approaches to protecting market share: proactive marketing through innovative capabilities and future vision, and defensive marketing such as reducing attack probability and diverting threats.