A RACI chart is a matrix that outlines the roles and responsibilities of team members in relation to tasks or deliverables within a project. RACI stands for Responsible, Accountable, Consulted, and Informed. By clearly defining who is responsible for what, and who needs to be consulted or informed on different aspects of a project, it helps eliminate confusion and streamline workflows. This clarity improves team productivity by ensuring everyone knows their specific duties and how they fit into the larger project goals.