Data sharing is the process of preparing high-quality data for access and reuse, firstly by our future selves and secondly by other researchers who seek to reproduce our results, engage our datasets in new questions or novel methods, train others, or include our work in meta-analyses. This unit puts data sharing in context with the requirements and benefits of sharing and helps you understand the power of metadata for making shared data useful regardles of how distant you or others are from that work.