This activity allows to send cross-platform notification using templates.
The connection string of the hub you want to send the message.
The name of the hub you want to send the message.
An object representing the notification just sent.
Tag expressions enable you to target specific sets of devices, or more specifically registrations, when sending a push notification through Notification Hubs.
The template params.
The DeviceId is used to send a notification to a specific device. This is can be taken from the registration of the app that recives the message.