When you turn on Manual Promotion, no notifications (emails, tweets or posts) are sent, until you decide your most recent paper edition is ready to promote.
Activate Manual Promotion (previously known as Notifications Control)
From your Paper Settings, click on the Scheduling tab to access all promotion (and publishing) controls.
Click the Promotion toggle to Manual.
How will I know when my paper is ready to be promoted?
Each time a new edition is published, you will receive an email notification letting you know your paper and/or newsletter is ready for review. You can review and edit your paper and when it's ready, click the "Send Notifications now" button in the Promotion section of your Scheduling settings (shown above).