This document discusses nudges and how they can be used by governments and businesses. It defines a nudge as a small change that guides people towards making better decisions without restricting their choices. The document outlines how the UK government established a Behavioral Insights Team to apply nudges in policymaking and provides examples of how companies like Amazon, Google, and Costco have used nudges. It advocates designing choice architecture that guides people towards the "right choice" by overcoming mental shortcuts and removing friction from the decision making process.