This document discusses monitoring and evaluation (M&E) of national adaptation plans and adaptation processes. It outlines the rationale for M&E, including understanding whether adaptation occurs and learning from experience. M&E can monitor both the NAP process and adaptation outcomes. Challenges to measuring adaptation outcomes include context-specificity and lack of common metrics. The document provides steps to develop an M&E system and examples of how countries monitor adaptation indicators and outcomes. Overall, M&E systems should be tailored to the context and focus first on implementation, then expand to outcomes over time.