To monitor the progress of a stage effectively, the project manager should review both the Highlight Report and Checkpoint Report. The Highlight Report provides a summary of the stage status to the Project Board, detailing overall progress and identifying any major issues. The Checkpoint Report, on the other hand, offers detailed updates from team managers or team members on the progress of their respective Work Packages.
Together, these management products give a comprehensive view of stage progress.References: (PRINCE2
7 Foundation Handbook, AXELOS)

Reference https://mplaza.pm/prince2-quality-register-template/

The purpose of the 'Organizing' practice within PRINCE2 is to establish and define the project management team structure and responsibilities. This includes specifying roles and responsibilities for managing, delivering, and overseeing the project effectively. The organization theme supports project success by ensuring clear definition and communication of who is responsible for various project activities.References:
PRINCE2 7 Foundation guide and official PRINCE2 documentation on organizing practices.