Maggie Humphrey shared that Google Ads is testing a new “Missed Growth Opportunities” tab that highlights potential clicks, conversions, and conversion value per campaign, based on Google’s recommended bid and budget adjustments.

She discovered this new report in the Labs section, that was introduced recently.
She also states that the keyword here is “potential,” but it’s still a handy way to gauge where you might scale campaigns and uncover untapped performance gains.