Sending notifications to multiple vendors
The main functionality of Notification Hubs is to send a notification to a set of registered devices. You will see that, using its SDK and portal, you can easily start using this feature without knowing the internal logic of different PNSes. After this section, you should be able to use Notification Hubs without problems and incorporate it into your applications.
Sending a test notification
While developing your application, you always need a way to test it. When using Notification Hubs, you have two options when it comes to sending a test notification—either use the portal or its SDK. Both possibilities allow for similar results; however, using the SDK is a bit more flexible as it is easier to find all the devices to which you would like to send a notification or add any kind of logic.
Test notifications in the Azure portal
When you go to the hub you created, you will see that, at the top of the page, there is a Test Send...