A Traceability Matrix is a tool used in project management and software development to ensure that all requirements are met throughout the project lifecycle. It maps requirements to their corresponding test cases, helping teams verify that each requirement is addressed and validated. This matrix serves as a reference point for tracking the progress of the project and identifying any gaps in coverage. By maintaining a Traceability Matrix, teams can improve communication and collaboration among stakeholders, including project managers, developers, and quality assurance testers. It also aids in managing changes to requirements, ensuring that any modifications are reflected in the testing process, ultimately leading to a more successful project outcome.