New Arrival emails automatically tell subscribed customers about fresh stock in the categories they follow. Everything below is configured in one place: Website › Marketing › New Arrival Notification, which has Settings, Advanced, and Email Template tabs.

How do I schedule my New Arrival emails?
On the Settings tab, set the Email Schedule frequency, the Day of Week, and the Start Time, then save. Because sends are staggered to protect deliverability, the exact time is not guaranteed — sending begins around your chosen time and continues hourly until every subscriber's email has gone out. (Set the schedule to Never to keep sign-up available but pause the emails.)
How do I see the last batch, and set the next one?
Last Sent shows the date and time of the last automatic send. Next Send shows when the next batch is due; enter a date and time (or use the calendar picker) to move it.
How do I edit the email itself?
Open the Email Template tab to edit the wording and layout that wraps the new-arrival listings. On the Advanced tab you can auto-opt-in new accounts, add an "other interests" field to the sign-up form, and set a Google UTM code for tracking.