This document discusses the concept of disruptive innovation. It defines disruptive innovation as an innovation that creates a new market and value network and eventually disrupts an existing market. Disruptive innovations make products and services more accessible and affordable. The document contrasts sustaining innovation, which improves existing products and markets, with disruptive innovation, which targets non-consumers and results in dramatic changes. It provides examples of low-end and new market disruptive innovations and discusses how disruptive innovations have impacted various industries like retail, airlines, photography, and more.