" In the Internet Century, a product manager’s job is to work together with the people who design, engineer, and develop things to make great products. Some of this entails the traditional administrative work around owning the product life cycle, defining the product roadmap, representing the voice of the consumer, and communicating all that to the team and management. Mostly, though, smart-creative product managers need to find the technical insights that make products better. These derive from knowing how people use the products (and how those patterns will change as technology progresses), from understanding and analyzing data, and from looking at technology trends and anticipating how they will affect their industry. To do this well, product managers need to work, eat, and live with their engineers (or chemists, biologists, designers, or whichever other types of smart creatives the company employs to design and develop its products). "
― Eric Schmidt , How Google Works