Drop a unimsg document here
It is read where you are, and goes nowhere. Nothing here knows what any document means.
Pinned for everyone
Put here by whoever runs this site, and served to every visitor. Documents you open go into the browser's own storage below instead, where only you can see them.
Kept in this browser
Documents you open are held in this browser's own storage so they are here next time. They were never sent anywhere and still have not been.