Customer dashboard gives you a drilled down view on your Customers count over a period of time.
You can view how many customers stayed with you for over a year or last 24 months by clicking on the default time ranges given in the top right of your dashboard.
You can view a Stacked bar of different components such as New, Reactivation, Existing and Churn that makes up for your customer calculation by hovering over every bar or scroll down to have a better understanding on component wise data breakdown.
Click on any of the data within the table to view the customer details that contributed to the data.