The document discusses the rise of social learning across enterprises. It argues that the nature of communication has changed from one-to-one to many-to-many. Also, workforces have changed with older workers retiring and younger workers having different expectations. Traditional training methods are ineffective. Social learning uses social media and user-generated content to improve learning in a more informal way. The document presents three models for implementing social learning and discusses benefits like increased scale, throughput, and sharing of expertise.