If you're not familiar with this report, it can be accessed by following these steps:
  1. Start from the Dashboard of the Core persona
  2. Next to Reports, click View All
  3. From the Category drop down, under User Management select Notification Reports
  4. Next to My Notifications Report, click Run
The report has options to filter for Category, the Notification Action within that category, Role, and Subscription Type.

When run, you will see "subscriptions", "subscribers", "emails", and "texts" with numbers next to them.

"Subscriptions" refers to the total number of subscriptions listed. If a user is signed up for both an email and a text notification, they will count as 2 in the "subscriptions" total, as two notifications are going out for them.

"Subscribers" refers to unique subscribers to the notification. If a user is signed up for both an email and a text notification, they will still only count as 1 in this total, as they are the only one receiving those notifications.

"Emails" and "texts" refer to the total of their respective notification type. The number next to "emails" will show how many email notification subscriptions there are, and the number next to "texts" will show how many text notification subscriptions there are. If you are only looking at the notification report for emails, "texts" will show 0, and vice versa.