How to alert the user to open the app (after queuing)?

1. How do you notify an app?
2. Which users can see the alerts of a queue?
3. What are alerts in an application?

How do you notify an app?

The Verify apps feature helps you protect your phone from potentially harmful apps. When it's turned on, your phone will be able to block the installation of apps and remove apps if security threats are detected. Go to Settings > Google > Security. Under Verify apps, turn on Scan device for security threats.

Which users can see the alerts of a queue?

Queue alerts can be desktop popup notifications and/or emails, and are configured in the Queue Dashboard. Only users that have the "Queue Supervisor" role enabled can set up queue alerts.

What are alerts in an application?

An app notification is a message or alert sent by an application to the device user. They include push notifications and in-app notifications. The main difference between in-app notifications and push notifications is implied by their names.