The document explores the potential use of the messaging tool Slack for knowledge management. It analyzes five case studies of Slack implementation to identify how the tool was used for different knowledge activities, including transferring, organizing, saving, acquiring, and generating knowledge. While Slack was intended for communication and coordination, the key factor influencing its actual use for knowledge management was the intentions of those implementing it. When implementors prioritized networking or project management, Slack supported different knowledge activities beyond just messaging. However, the context of implementation only set possibilities—the implementors' goals determined how Slack benefited knowledge management in each case.