Based on feedback from publishers, Google Inc. decided to retire the ad balance feature from Adsense. Going forward,Google focus on developing our suite of blocking controls instead.
Google decided to removing ad balance from AdSense accounts on May 20, 2020. Also remove the ad balance experiment option, including all completed ad balance experiments, on this date. If you’re currently using ad balance or running ad balance experiments, Google will email you with additional information. If you’re not using these features, then you don’t need to take any action.