This document provides guidance on green marketing, including dos and don'ts. It discusses why businesses should engage in green marketing, noting that it addresses customer needs, tells a compelling story, adds value, and creates competitive advantage. The document also outlines what matters to customers, such as assurance, risk management, and shared values. It identifies emerging drivers like legislation and offers tips on what works with green marketing claims and what practices to avoid, like vague or irrelevant claims that amount to "greenwashing".