The issue here is that once a line item has been created in Display & Video 360 with specific targeting parameters, such as mobile in-app targeting, it cannot be altered at the insertion order level.
- It’s impossible to modify insertion order targeting at the line item level.
- It’s impossible to modify targeting once the campaign has line items assigned.
- It’s impossible to modify targeting for mobile in-app inventory at the line item level.
- It’s impossible to modify existing line item targeting at the insertion order level.
The correct answer is: It’s impossible to modify existing line item targeting at the insertion order level
Explanation: In Display & Video 360, targeting settings for a line item are fixed and can’t be modified through higher campaign hierarchy levels, like the insertion order. This means any targeting exclusions or changes need to be made directly within the line item itself. To correct the targeting from mobile in-app to mobile web, you’ll need to go back and edit the targeting settings within the specific line item where the targeting was originally set. This procedure is essential to ensure that the campaign’s reach is aligned with your intended audience and campaign goals.
Read more here: https://support.google.com/displayvideo/answer/2948712