This is the instructions on how to update the Google Ad Manager (GAM) Forecast impressions on the Inventory app/Salesforce. This is for those who need to know.

From time to time, Jason Hill, who manages the digital Ads for our websites, reaches out with the request to update the inventory of a specific product.

Please note that this only applies to our Digital Product inventories (like Run of Sites, Leaderboard, Medium Rectangles, Persistent Footers, etc. from MAL, GEN and IPM sites) So you must determine first if his request apply to this or not.

So to do this, you just need to run this API call below (I use Postman for this):

HTTP POST: https://gamapi.liebertpub.com/api/generateforecasts?l=[LINEITEMID]&d=[STARTDATE]

Where parameters:

• “l” – LineItemId value you need to refresh
• “d” – StartDate, or the beginning date you need to refresh (MM/DD/YYYY)

Example:

https://gamapi.liebertpub.com/api/generateforecasts?l=5431970125&d=10/1/2023

This example updates the GAM forecasts for LineItemId 5431970123 (Large Rectangle 300 x 600 and 320 x 50 ROS) beginning 10/1/2023. It generates monthly forecast for up to 7 months at a time, so this means when this runs, it will update and/or creates the forecasts from 10/1/2023 up to 5/1/2024.

He should tell you the LineItem Id and the Start Date he wants you to update.

And once it is updated, Jason will able to proceed with his requirements as it should already satisfy his Inventory criteria.