What we called maintains that when we say something is good, we are showing our approval of it and recommending it to others, and when we say something is bad, we are showing our disapproval of it and oppose that others do it.

Answer: Emotivism

Explanation:

In "The Emotive Meaning of Ethical Terms," Charles Stevenson developed emotivism, his greatest contribution to philosophy. Emotivism is a theory of ethical language that states moral judgments are not facts, but expressions of the moral ideas of the speaker, such as approval or disapproval, and are aimed to inspire others to follow them as well.