Use Placements to control when and how your Promotions display in-game. You create Placements on the Developer Dashboard, then call them via code in the Unity Editor, similar to normal Unity Ads Placements.
Create Promo Placements on the Operate page of the Developer Dashboard. Your active Project appears in the top-left corner. To create a Promo Placement:
Select Monetization > Placements from the left navigation bar.
Click the ADD PLACEMENT button in the top-right corner.
Enter a Placement Name, then select whether the Placement is Rewarded or Non-rewarded (for more information on rewarded and non-rewarded ad Placements, see documentation on monetization best practices).
Note: The dashboard auto-populates Placement IDs based on the Placement’s name. You cannot edit Placement IDs after the Placement is created, even if you updated the name. Use them to call Placements in your code using the Unity Ads API (see Unity Ads documentation on Placements and filters for more information).
Select CREATE NEW PLACEMENT to save the new Placement and return to your Project’s Placements list.
Select the Placement you created for IAP Promo to open its General Settings menu.
Expand the Ad Types setting, then check IAP and click the SAVE button.
Your Placement is now configured for use with IAP Promotions.