Green marketing involves modifying products, production processes, packaging, and advertising to market more environmentally friendly options. It utilizes strategies like relative advantage, observability, trialability, and compatibility to promote green brands and initiatives. Examples discussed include Starbucks promoting earth-friendly practices through product changes and social media, and Nokia's phone recycling program. Many other companies in India are also adopting green solutions across industries like banking, telecom, oil and gas, and automotive.