WhatsApp Subscriber Analytics allows you to see details about your subscribers. You can track the number of subscribers to see the growth, so that you can create more effective campaigns for your subscriber base to grow.
1. To reach the dashboard, navigate to Reports > WhatsApp Subscriber Analytics.
2. You can select a time range using the date picker on the top right corner of the page to filter the performance metrics. 
3. Narrowing down your results, you can see the following metrics:
Subscribers: The total number of your WhatsApp message recipients in the selected period of time.
Subscribers Growth: The percentage of increase (or decrease) in your Subscribers in the selected period of time.
Unsubscribers: The number of recipients who unsubscribed from your WhatsApp messages in the selected period of time.
Unsubscribers Growth: The percentage of increase (or decrease) in your Unsubscribers in the selected period of time.
The charts section displays net growth details for both your subscribers and unsubscribers on a line chart, based on your selected time range.
If a user blocks your WhatsApp Business phone number, they do not count as an unsubscriber.