How does proofing work for my client?

On a service set to Proofing: the client picks their favorites, the flow looks like this:

1. You upload your camera originals (RAW files) and send the ones you choose for proofing.
2. The client sees small previews, hearts their favorites and can add notes for the editor.
3. You edit the photos they chose and upload them.
4. The client reviews the edited photos with a watermark, then accepts them or sends some back with notes.
5. Accepted photos are unlocked and delivered.

Clients never get the RAW files. For your side of this, see Run a proofing gallery.