This document provides an overview of ethics as a branch of philosophy concerned with concepts of right and wrong conduct. It discusses the major areas of ethics including meta-ethics, normative ethics, and applied ethics. Meta-ethics examines what right and wrong mean and whether moral propositions can be true or false. Normative ethics investigates standards for determining right and wrong actions. Applied ethics involves applying philosophical methods to specific moral issues. The document also discusses moral theories like consequentialism, deontology, and virtue ethics as well as challenges to ethics such as moral relativism.