This book consists of four chapters, with fifteen sections, and provides a guide to understand the value of data, the different types and sources of data and identify the type of services that data enables in agriculture. The first chapter “Data, services and applications” focuses on the topics of value of data in agriculture to support farmers, how to increase their income and develop food production, digital farmer profiling and the strategies to design business models for profiling. The chapter two “Data sharing principles” takes the readers to the principles and benefits of shared data, the potential of using and publishing data in agriculture, responsible data sharing practices for farm data, ethical and legal sensitivities of data-driven services and data protection. In detail, it addresses challenges in data sharing for smallholder farmers, issues regarding data ownership and data rights, outlines different roles of public and private data sources, challenges in reusing them in services for farmers. The third chapter “Using data” guides readers on how and where to find open data, data quality elements, data analysis and visualisation with more technical background and in a broad sense, not only relevant for farm data. This chapter is based on the free online course on “Open data management in agriculture and nutrition” (GODAN Action, 2018). The last chapter of the book “Exposing data” provides an overview on conceptual frameworks for sharing data and outlines comprehensively the ways to make data findable, accessible, interoperable, and reusable. The chapter goes deep into the interoperability and semantics as a key element in reuse of data by different systems at machine level. Book readers can either go through the full content and embrace all aspects of the topic or may want to visit specific parts of the book based on their area of interest. The wider community at all levels in the agricultural domain can benefit from this book and build their own stories to tell from implementing some of the lessons learnt.