Social innovation leverages crowdsourcing to generate new ideas through collective intelligence that is more valuable than any individual idea. Companies are increasingly using social innovation to engage employees and speed innovation to market. Dell, Starbucks, and Cisco have found successes through social innovation platforms, generating new product ideas like Dell's Ubuntu laptop and Starbucks' splash sticks. Companies like Procter & Gamble have seen major benefits from social innovation, increasing productivity by 60% and success rates from 35% to 80% while decreasing R&D spending. Key lessons include ensuring executive support, managing the idea process, focusing challenges, recognizing top contributors, and assessing key performance indicators.