This document discusses the key branches and areas of ethics. It begins by explaining that ethics is the branch of philosophy concerned with concepts of right and wrong conduct. It then outlines the four main areas of ethics: value theory, which examines what constitutes a good life; normative ethics, which proposes moral theories and principles of right action; metaethics, which examines the nature of ethics; and applied ethics, which addresses practical problems in various fields. The document provides examples and explanations of theories within each area, such as utilitarianism and deontology in normative ethics, and cognitivism vs. non-cognitivism in metaethics. It concludes by emphasizing some important distinctions for doing ethics, such