This document discusses the differences between proactive and reactive innovation. Proactive innovation involves extensive research and development to create new products and services that shape consumer demand, while reactive innovation solves problems or capitalizes on opportunities. The document provides examples of both types from Advertising.com's history, including developing a new pay-for-performance advertising model proactively and launching a demand-side platform to compete with others reactively. It emphasizes that innovation should be a cultural characteristic that encourages new ideas from all employees through dedicated innovation teams or "start-ups" within the company.