This document discusses monitoring, evaluation, and learning (MEL) for demand-led plant breeding programs. It provides definitions for key terms related to breeding goals, objectives, outputs, outcomes, and impacts. Principles of demand-led breeding include being target-driven and designing strategies around client needs. MEL is important for delivery, quality, accountability, and learning. Breeders should track variety adoption and performance using methods like GPS coordinates. Case studies can communicate learning and impacts to stakeholders.