Now available for Display campaigns is the campaign optimization score that Google Ads displays for Search and Shopping campaigns. Scores are available at the campaign level, and a combined account-level score encompasses Search, Display and Shopping. It’s possible that you could also see recommendations that are tailored to Display campaigns.
Google Ads optimizations scores range from 0% to 100% and indicate how well your campaigns are expected to perform based on different factors like targeting, bid automation, ads and extensions. This score is accompanied by a set of automated recommendations with indicators of how much of an improvement in score you can expect to see if you accept them.