The order of products is based on the product´s score quality multiplied by the CPC (cost per click) set on your system.
You can achieve a higher product quality score by using a quality feed in which you post not only the mandatory ones but also additional elements (mainly parameters, alternative images, and shipping options with price). A quality feed is the most important building block for excellent results for your campaign.
Furthermore, a higher quality score will contribute to a higher product CTR (click-through rate), higher popularity among users, good product availability (whether the product is in stock and what is the delivery time), and product sales (to have the system have information about the product sales, you need to have a connection to Google Analytics ). Another essential component of the quality score is using the FAVI EXTRA review collection feature.