Stakeholder engagement in the context of Clean Air Zones (CAZ) refers to the process of systematically involving all relevant parties, such as ULBs, policymakers, residents, businesses, transport operators, health professionals, and others, in the project life cycle. A thorough stakeholder engagement strategy brings in stakeholders at the planning, design, implementation, and evaluation stages of the project. Stakeholder engagement can be conducted through various methods, including public awareness campaigns, consultative workshops with stakeholders at different levels of government, public meetings, and surveys or discussions with citizens and business owners. These methods are detailed in this guidebook. Engaging a variety of appropriate stakeholders is essential for public buy-in to urban initiatives and ensures the project reflects the diverse needs and desires of those it aims to serve.