AIM (Action Items Management) is a tool that allows users to create, assign, and manage action items. It provides centralized access for action items created in various other Sapienza systems. Users are assigned roles on action items including Creator, Owner, Actionee, Contributor, and Viewer which determine access and permissions. The status of action items can be Open, Closed, Completed, or Cancelled, and users receive email notifications based on their role and notification preferences.