This document discusses the roles of salespeople, sales leaders, and marketing in effective social selling. It states that social selling is most effective when these groups collaborate. For salespeople, it recommends using social media to research and connect with prospects, developing an optimized online profile, and tracking social selling performance using a Social Selling Index score. For sales leaders, it suggests inspiring the sales team to adopt social selling, practicing it themselves as an example, and using tools like LinkedIn Sales Navigator to track team performance. Marketing needs to provide sales-friendly content and best practices for social engagement.