The document is an Ogilvy report analyzing the 12 fastest growing middle class markets, which it calls the Velocity 12 markets. These 12 markets comprise over half of the world's population and are reshaping global growth as the middle class becomes the majority in local populations. The report discusses key drivers of growth in these markets like gender, culture, urbanization, and technology. It also provides marketing strategies and principles for companies to succeed in these emerging consumer markets, with a focus on understanding local contexts. The Velocity 12 markets present major long-term growth opportunities for global brands due to the rapid expansion of their large and connected middle class populations.