As you may already know, you can use Pushpad to collect metrics about the delivery of web push notifications. We have recently updated the docs with more detailed information, so you can check them out.
Today we are also happy to announce that a new metric is displayed in the dashboard: the Click-through rate (CTR). The CTR is a key metric to understand how much the users appreciate your notifications. You can see CTR for both projects and single notifications.
We are also planning to add new exciting features to stats in the next weeks: stay tuned for announcements by subscribing to push notifications.