Nudging is a concept in behavioral economics that involves subtly guiding individuals toward making better choices without restricting their options. It leverages insights from psychology to influence decisions by changing the way choices are presented. For example, placing healthier food options at eye level in a cafeteria can encourage better eating habits. The term was popularized by the book "Nudge" by Richard Thaler and Cass Sunstein, which discusses how small changes in the environment can lead to significant improvements in decision-making. Nudging is often used in public policy, marketing, and personal finance to promote positive behaviors while maintaining individual freedom.