Prior to your application approval, you will only receive Public Service Announcement (PSA) ads which are free, unpaid advertisements. This is meant strictly for testing purposes until your application is approved and begins to deliver paid, live ads. Below are a few examples of PSA ads that you will see with an unapproved app.
IMPORTANT: You will not receive any revenue or record any impressions from PSA ads!
300x250 Test Ads
320x50 Test Ads