The Service summary details the evolution of subscriptions and unsubscriptions of your service.
This report is only accessible from your Service page via the advanced menu Profiles & Audiences > Services. For more on this, refer to this page.
The Subscription evolution curves visualization details the number of subscriptions and unsubscriptions depending on the Period chosen in the drop-down bar.
The Overall subscription evolution allows you to see the evolution of your subscribers throughout different periods of time.