Culture is one of the most important concepts within sociology because sociologists recognize that it plays a crucial role in our social lives. It is important for shaping social relationships, maintaining and challenging social order, determining how we make sense of the world and our place in it, and in shaping our everyday actions and experiences in society. It is composed of both non-material and material things.

In brief, sociologists define the non-material aspects of culture as the values and beliefs, language, communication, and practices that are shared in common by a group of people. Expanding on these categories, culture is made up of our knowledge, common sense, assumptions, and expectations. It is also the rules, norms, laws, and morals that govern society; the words we use as well as how we speak and write them  and the symbols we use to express meaning, ideas, and concepts (like traffic signs and emojis, for example). Culture is also what we do and how we behave and perform (for example, theater and dance). It informs and is encapsulated in how we walk, sit, carry our bodies, and interact with others; how we behave depending on the place, time, and "audience;" and how we express identities of race, class, gender, and sexuality, among others. Culture also includes the collective practices we participate in, such as religious ceremonies, the celebration of secular holidays, and attending sporting events.