Create a group inventory containing multiple publishers to customize which services can display your ad.
Open the Inventory screen.
Select the Inventory Groups tab, located at the top of the screen.
Select +Add Inventory Group from the Inventory panel, located on the left side of the screen.
Enter the name of your new inventory group.
Select Add.
Select your new Group Inventory from the Inventory panel.
Select + Search & Add Inventories.
Select the checkboxes of the publishers you want to add from the Inventory Table.
Select Add to Group.
Create a new Group Inventory from the Inventory Table
To create a new Group Inventory from the Inventory Table:
Open the Inventory screen.
Select the All Inventories tab, located at the top of the screen.
Select the checkboxes of the publishers you want to add from the Inventory Table.
Select Add to group.
Enter the name of your new Group Inventory.
Select Add.