Especially for leaders, informal communication can be a valuable leadership tool to obtain important information about the needs and life circumstances of their employees. This not only helps to strengthen the relationship with their employees, but also to take measures and make decisions that have a positive impact on motivation, performance, and health. Therefore, this chapter will shed light on the concept of informal communication and reasons for integrating this type of communication into leadership activities. In addition, recommendations for action will be derived to support leaders in effectively communicating informally and promoting communication among team members.