This document provides an overview of Community Led Total Sanitation (CLTS), an approach to ending open defecation by empowering communities to recognize issues with sanitation and take collective action to become open defecation free. It describes how CLTS was developed, how it has been implemented in India, its key principles of igniting behavior change through collective action rather than subsidies, and participatory methodology using tools like transect walks and feces calculation. Implementation in states varies with some seeing coverage increases of 60-70% using CLTS in all districts, while others see smaller gains. The role of block coordinators and an example resource person are also outlined.