Arjun Appadurai is a grown-up who studies how people from different parts of the world think about things and make decisions. He likes to look at how different cultures interact with each other, and he thinks it's important for us to understand these things in order to get along with each other better.
He makes lists of things that people use and how they use them, like cars, clothes, and cell phones. Then he studies how people's ideas about these things change depending on where they come from and what their culture is like.
For example, some people might use a car just to get from point A to point B, while other people might see it as a status symbol and want a fancy car to show off. Arjun Appadurai likes to understand why people think about things like this in different ways.
Overall, Arjun Appadurai helps us understand how the world is changing as people from different cultures share ideas and interact with each other.