Search Ads 360 API may be used to edit custom Floodlight variable data.
- Text Editor
- Google Ads API
- Bulksheets
- Search Ads 360 API
The correct answer is: Search Ads 360 API
Explanation: Before you can use a custom Floodlight variable as a metric in a Floodlight column, you’ll need to specify in Search Ads 360 that the variable’s data type is a metric.
Read more here: https://support.google.com/searchads/answer/6024745