The rapid growth of machine learning (ML) technologies has transformed industries by enabling data-driven decisionmaking, yet it has also raised critical ethical concerns. Frameworks for ethical data governance are essential to ensure that ML systems uphold privacy, fairness, and business optimization while addressing societal and organizational needs. This review explores the intersection of these three pillars, providing a structured approach to balance competing priorities in ML applications. Privacy concerns focus on safeguarding individuals' data through strategies such as anonymization, differential privacy, and adherence to regulations like GDPR and CCPA. Fairness involves mitigating biases in datasets and algorithms to prevent discrimination and promote equitable outcomes. Business optimization emphasizes leveraging ML responsibly to maximize value without compromising ethical standards. The proposed frameworks integrate legal compliance, organizational policies, and technical solutions to achieve a holistic approach to ethical data governance. Key components include privacy-preserving techniques, fairness-aware ML models, and transparent decision-making processes. Challenges such as balancing trade-offs between privacy and utility, addressing bias in data, and ensuring scalability in implementation are critically examined. Case studies highlight successful applications of ethical data governance in real-world scenarios, demonstrating the viability of these frameworks in promoting both ethical integrity and business innovation. Emerging trends, such as federated learning, AI ethics boards, and international collaboration on data standards, are identified as pivotal for advancing ethical practices. This review emphasizes the necessity of embedding ethics throughout the AI lifecycle, from design to deployment and monitoring. By adopting robust governance frameworks, organizations can foster trust, comply with regulatory mandates, and harness the full potential of ML responsibly.