What is the "Upload notes as PDFs (Google Drive)" option and is it private?

It's an opt-in switch on the Google Tasks card, off by default. When on, pushing a note-linked task uploads that note's PDF to a "Supernote Notes" folder in your OWN Google Drive and puts a clickable Drive link in the task, so you can open the note from any device. The files stay private to you (owner-only, never shared publicly), and the app can only ever see files it created — not the rest of your Drive. Your notes stay on your device until you deliberately turn this on.