This document provides an introduction to Sanitation and Water for All (SWA), which aims to address the lack of access to water, sanitation and hygiene services. SWA seeks to increase political prioritization, promote evidence-based decision making, and strengthen national planning processes. It functions as a platform for coordinated action, global dialogue, implementing aid effectiveness principles, and mutual accountability. SWA has achieved increased political commitment through high-level meetings and helped countries develop their own tools to support progress in the sanitation and water sectors.