Agitators are devices or tools used to mix or stir substances, often in industrial or laboratory settings. They help ensure that materials are evenly distributed and can enhance reactions by increasing contact between different components. Common types of agitators include mechanical stirrers, magnetic stirrers, and air-driven mixers. In a broader context, the term "agitator" can also refer to individuals or groups that promote change or provoke action, often in social or political movements. These agitators aim to raise awareness about specific issues and encourage others to participate in discussions or protests related to topics like civil rights or environmental justice.