YouTube Studio Analytics: Subscribers
The Subscriber page on Analytics is a good way to see how you’ve been doing with gaining subscribers, as well as the ones you’ve lost.
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Subscribers: This shows the change in total subscribers found by subtracting subscribers lost from subscribers gained for the selected date range and region.
Subscribers Gained: This shows the total number of times users subscribed to this channel for the selected date range and region.
Subscribers Lost: This shows the total number of times users unsubscribed to this channel for the selected date range and region.