This document discusses indicators for measuring the success of social and behaviour change programs. It defines indicators as things or changes that are measured to assess outputs and outcomes. Examples of indicators include the number of STI tests conducted or the percentage of youth reporting condom use. The document outlines different layers and types of indicators, from output indicators measuring activities, to outcome indicators assessing results, to impact indicators evaluating population-level change. Key indicators for social and behaviour change programs are identified as adoption of promoted behaviors, risk perception, message recall, attitudes, skills, product awareness, and advocacy. Stages of change are also discussed.