Setting up ad inventory in GAM for Jeeng to create email ad tags
Follow these instructions so that Jeeng can supply you with ad tags for your emails.
1. Go to Google Ad Manager - Home
2. Click on Inventory

3. Then Ad units

4. Click on the New ad unit button

5. Type "Test Newsletter Inventory" or any newsletter name

6. For the code, you cannot use special characters such as "spaces"

7. Type "Test_Newsletter_Inventory"
Following the example from earlier, use "underscores" instead of spaces.

8. Scroll down to sizes

9. Type "300x250" or whatever size you plan on testing
Include all sizes that belong under that newsletter, even if there will be multiple placements.

10. Example we are using here is a 300x250

11. Remove reward settings
This won't function in email

12. Remove the AdSense for unsold inventory
This won't function in email.

13. Scroll to the bottom and click on SAVE

14. Go back to Ad units on the left menu option

15. Type for the original parent we created a moment ago
In this example, you can search for "test newsletter"

16. Click on + Add child ad unit once you find the original parent ad inventory

17. Type out the first placement's name

18. We are labeling ours "300x250 Top" in this case

19. Head to the "Code" section

20. Type "300x250_top"
Just like last time, you cannot use spaces, so we are using an underscore.

21. Go to Sizes, and type "300x250"

22. Scroll down to click on SAVE

23. Head back and find the parent ad unit so we can create the next child placement

24. Search for the parent on the right

25. Click on + Add child ad unit

26. Repeat the previous steps, only this time labeling this placement something different

27. We're calling this "300x250 Bottom"

28. Follow the same steps as before then click on SAVE

29. Click on All ad units one last time

30. Click on "View child ad units" so we can find the lowest child ad unit

31. Click on 300x250 Top

32. Select Tags

33. Click on dropdown, and select "Mobile Application Tag"

34. Select CONTINUE

35. Click on Copy tag
What you see here is your instance ID, followed by the parent ad unit's code, followed by the child's code. We need this for each ad tag request, because it's how we tie our tags to your GAM instance correctly.
Normally we will supply a Google spreadsheet to you to fill out where you can add this mobile application tag.