You can now target your best-selling items when creating promotions in Google Merchant Center.
The new “Top-performing products” option automatically identifies high-performing products based on Google’s performance signals, letting you apply offers only to your strongest SKUs instead of your entire catalog.
Ideal for peak seasons like Black Friday or holiday sales, this helps advertisers boost ROI while avoiding blanket discounts.

Note: Google’s definition of “top-performing” may differ from your analytics, so review suggestions before applying.
Watch the full video by Emmanuel Flossie here: Target Top-Performing Products in Promotions! New Google Merchant Center Feature