What is the purpose of "feed rules" in Google Merchant Center?

The purpose of "feed rules" in Google Merchant Center is to manage and optimize the product data in the feed automatically. Feed rules allow advertisers to create customized transformations and adjustments to the product data before it is submitted to Google for ads and listings. This can include modifying attributes, setting default values, or combining fields to ensure that the product data meets Google's requirements and enhances its effectiveness in campaigns.

Using feed rules helps streamline the process of maintaining accurate and up-to-date product information, which is essential for achieving higher visibility and better performance in shopping ads. By automatically optimizing the data, businesses can save time and improve the quality of their product listings without the need for constant manual intervention. This ultimately leads to more effective advertising and better results for campaigns.