A "Nudge Unit" refers to a team or organization that applies behavioral science principles to influence people's choices in a positive way. The concept is based on the idea that small changes in how options are presented can significantly impact decision-making without restricting freedom of choice. The most well-known example is the Behavioral Insights Team in the United Kingdom, established in 2010. Nudge Units work with governments and organizations to design interventions that encourage better behaviors in areas like health, finance, and environmental sustainability, ultimately aiming to improve public policy outcomes.