You may place up to three AdSense enabled units on one webpage if all of the following criteria are met:
- You're using DFP Small Business to serve only AdSense ads on a page.
- There are no delivering line items targeting an AdSense-enabled unit.
DFP Small Business will detect the multiple ad units and display an optimal number of highly-targeted Google ads unique to each ad unit on the page.
We encourage you to enable AdSense for your ad units to minimize unsold inventory and maximize revenue.