"In this tutorial we're going to learn how to create and display ads with the Facebook Instant Games Plugin for Phaser 3. Ads are a way for your game to earn money and are provided as part of the Facebook platform.
When an ad is displayed your game effectively pauses, so we'll cover how to handle these pause and resume states. It's worth mentioning that in order to display ads in your game, you'll need to register with several other Facebook systems, outside of Instant Games. These are business requirements, as the Ads system brings together a number of different services."