A customer receives a web push notification only if they agreed to receive such notifications (through an [agreement form](/docs/campaign/Webpush/one-step-agreement-form)) and they must have an active token. To verify the number of customers who will receive the notification, perform the following steps:
1. Create a segmentation.
2. In the first condition, use a `receive_webpush_messages` attribute set to `true`.
3. In the second condition, use a `snrs_has_webpush_devices` attribute set to `true`. 
4. Define the dependency between two conditions as `AND`.
5. Click **Save** and check the preview.