It's all about the knowledge: What Would Google Do author Jeff Jarvis explains why Google (GOOG)...

|By:, SA News Editor
It's all about the knowledge: What Would Google Do author Jeff Jarvis explains why Google (GOOG) needs Twitter: Amazon.com (AMZN) knows how we shop. Google knows what we're looking for. And Twitter is headed to knowing the most about what we’re doing and thinking.