One form, multiple experiments. After you submit your first experiment interest form, you will have your own portal moving forward. From there you can add or remove experiment interest and see the latest published experiments.
Ongoing experiment submissions, one portal. View individual status updates from publishers from pending review to experiment access granted. Log in to your experiment portal at any time to view real time changes.
Multiple experiment publishers, one Google experience. You'll recieve updates every step of the way and email communication with any further actions.