Create a photo gallery
Open Menu, then WEBSITE, then Photo galleries, and tap + New gallery.
Give it a Gallery name, something like a client name and the occasion, then tap Create.
Fill it using Add from library, which pulls from Photo library, the place that holds every photo on your account including ones not in any gallery. An empty gallery says "Add photos to start building this gallery."
Galleries are how you deliver: watermarked previews, proofing, and pay-to-download pricing.
On a team, if you can see a gallery but cannot change it, that is expected. The screen says "Viewing only. The owner manages your team's galleries."