1. Go to the waitlist page in-app and you will see the list of zipcodes and the number of subscribers for each zipcode in the Total Subscribers column.
2. In the Action Column just click on the Bell Icon to Notify all the subscribers of that zipcode.
3. Note - If the Bell Icon is in Grey Color then you must set The Notification Mailer Settings in the Settings page, If the Notification Mailer Settings is Configured then you will see a Blue Bell Icon, and on clicking that Blue Bell Button all the subscribers of that zipcode will be notified.