After you have configured your application to handle push messages and updated the push settings for the application in studio you may want to send a test push message so see a push message on your device. 
You can send a test push by triggering a test push from a workflow.

In your account go to your workflows and create a new workflow.
 

In the workflow add a Mobile Push message

Select the Edit option on the new push message, select the application that you have set up and add some content to the Title and Body fields so you can identify the message. When you're done your message may look something like this:

At this point you're ready to send your test push message!
Select the Send test push option and a modal will display and you can either scan the QR code or copy the link that is displayed to your device to trigger the test push message.