This publication is an update to the 2016 FAO/FHI 360 joint publication MDD-W (Minimum dietary diversity for women): A Guide to Measurement. It includes guidance on the most accurate and valid methodologies on collecting, analyzing, interpreting, and presenting data on women’s dietary diversity, for use in research, impact assessment and large-scale, health and nutrition surveys such as the Demographic Health Survey (DHS), to generate nationally representative data, that are comparable over time and across countries. In addition to supporting the regular collection of high-quality dietary data following standardized methodologies, the publication also aims to promote dialogues on and appropriate application of the data towards informing policy and programming decisions and monitoring and evaluation of nutrition outcomes and progress at global, regional, and country levels.