In this view the administrator can see a list od archived packages, both clean and quarantined. Archived packages are not visible to users and cannot be downloaded by users.
The archive is optional and can be disabled, see Basic settings Settings - Configuration - Packages - Expiration.
For details about available actions and flags see Active packages, Quarantined packages and Deleted packages. The shred action has the same behavior like in Deleted packages, which means irrevocably erasing the package files and freeing up the space.