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Google Ads announced that shopping campaigns now also get an optimization score. Google said "We recently expanded the score to include Shopping campaigns - in addition to Search campaigns -to provide more, real-time recommendations for improving overall account performance."
Here is a screen shot:
Google explained that like for Search campaigns, optimization score for Shopping campaigns ranges from 0% to 100%, with 100% meaning that your campaigns are set up to perform at their full potential. You’ll see separate scores for Search and Shopping at the campaign level, and one combined score at the account level.
You can learn more over here.
Forum discussion at Google Ads Help.
