Ethics is a subject that studies moral principles and values, and discusses how human beings deal with moral problems and how to behave in society. It involves moral behavior, moral values, moral norms, moral judgments and so on. It is a subject that studies human moral behavior and values.

Ethics can guide our moral decision-making, because it provides some basic moral principles and values, such as justice, respect, responsibility, honesty and charity, which can help us judge moral problems and guide us to make correct moral decisions.

For example, if we encounter a moral problem, such as whether we should help a person in need, we can consider moral principles such as justice, respect and charity, weigh the pros and cons and make the right decision. If we follow these basic moral principles and values, we can make better moral decisions and get better life experiences.

In a word, ethics can help us understand moral principles and values and guide us to make correct decisions on moral issues. Following moral principles and values can help us become better people and create a better social environment.