The book argues that ethical data use isn't just about compliance; it's essential for building trustworthy technological systems. It begins by laying out the core concepts of data ethics, then explores challenges in data gathering and platform design, using case studies to illustrate ethical and unethical practices. By integrating ethical theory with practical guidance, "Ethical Data Use" provides actionable strategies for policymakers, technologists, and anyone interested in fostering a more ethical data ecosystem, emphasizing the importance of data governance.