This document discusses data licensing and provides guidance on applying licenses to research data. It covers what a license is, why they are important for enabling reuse and collaboration, and recommends using licenses from the AusGOAL framework. The document explains that without a license, others cannot legally reuse or share the data. It provides examples of licensing different types of data and notes special considerations for sensitive health data. Guidance is given on how to physically apply a license and ensure proper attribution.