Culture is a shared system of symbols, beliefs, attitudes, values, expectations, and norms of behavior that is learned and shared by a group of people. It influences how people view the world, make sense of what they see, and express themselves. There are multiple dimensions of culture, including individualism vs collectivism, power distance, uncertainty avoidance, and time orientation, that impact communication styles across cultures. Understanding cultural differences can help reduce bias and improve intercultural communication and relationships.