This chapter explores the ethical dimensions of artificial intelligence (AI), emphasizing the importance of embedding ethics throughout the AI development lifecycle. It introduces foundational principles—transparency, fairness, accountability, privacy, and non-maleficence—and examines practical frameworks like AI Ethics by Design. Through historical context, classifications of AI, case studies, and governance models, the chapter offers a comprehensive overview for developers, policymakers, and researchers committed to responsible AI. It culminates in actionable strategies and tools for implementing ethical practices in real-world AI systems. Ethical considerations in AI are not merely theoretical but practical necessities that shape the development and use of AI technologies. Through adherence to ethical principles and the integration of frameworks such as AI Quality by Design, AI systems can enhance human welfare and minimize potential harm. This chapter offers key Features: