In communication science and public relations, "public" mostly means people.[1][2] The meaning of this is different than other ideas, such as gatherings in social life to talk about people (public sphere).[1] The meaning of this is also talked about in the learning of government (political science), the learning of how humans think (psychology), and the learning of giving things to people (marketing). This word's meaning is very hard to make, as people think that public has different meanings.[3]