The document discusses three levels of leadership that were important for Atos's successful social collaboration transformation: leadership from the top to establish strategy and set an example, leadership from grassroots employees to normalize and personalize the change, and leadership from middle management to implement social project management, helpdesk, and ideation tools. The transformation benefited Atos's customers and allowed various teams within the company to improve processes like asking SAP experts questions, incident management, and monthly finance reviews.