Rajeev Bhaskar Sahi discusses how the concept of marketing has changed over time. He notes that while some aspects remain constant, others have changed, and it is important to examine what has changed and what hasn't. Sahi also discusses the need to consider one's own context, resources, competitors, and industry when developing a marketing strategy, rather than just following general advice or models. An effective strategy requires understanding one's current situation and goals, and focusing on delivering a unique promise to customers through differentiation, foresight, and building brand mindshare.