This document provides an overview of monitoring and evaluation principles for development projects. It defines monitoring as the regular collection and analysis of information to track progress, verify standards, and make decisions. Evaluation is defined as systematically and objectively measuring a project's achievement of objectives and attributing changes to the project. Key differences between monitoring and evaluation are discussed. The project cycle and results-based management approach are also reviewed. Challenges in monitoring and evaluating advocacy work are addressed, including developing appropriate indicators and accounting for multiple contributors to outcomes.