A microsystem refers to a small, immediate environment where individuals interact with one another. This can include family, friends, and close colleagues, forming the core of a person's social network. The dynamics within a microsystem can significantly influence an individual's behavior, development, and overall well-being. In the context of Bronfenbrenner's ecological systems theory, a microsystem is the first layer, emphasizing direct interactions and relationships. It plays a crucial role in shaping experiences and providing support, as it encompasses the settings where individuals spend most of their time, such as home, school, and workplace.