This document discusses communication for development (ComDev) to support improved land and water management programs. It defines different types of communication, including corporate communication, internal communication, advocacy communication, and communication for development. Communication for development uses participatory methods to support sustainable change by engaging stakeholders. The document provides examples of ComDev projects in Mexico, Bangladesh, and Bolivia that used participatory communication approaches. It discusses key ComDev elements like fostering dialogue and convergence of local and scientific knowledge. Finally, it introduces the Communication for Sustainable Development Initiative, which aims to improve capacities and partnerships for natural resource management through communication.