The recommended omnibidding setup for categories that are offline only is at the “Campaign level”.
- Ad level
- Ad group level
- Account level
- Campaign level
The correct answer is: Campaign level
Explanation: Using the Campaign level allows you to optimize specific campaigns toward omnichannel goals. This setup is ideal for those wishing to conduct a preliminary test before a full-scale omnichannel approach or when offline conversions pertain solely to certain categories.