Unlike Search Ads, Shopping Ads don’t use keywords or ad text. Instead, Google uses a file that you provide called a product feed (more on this later) which contains all of your store’s product data (things like titles, descriptions, images, prices, etc.), to automatically create the advertisement.

Unlike the more traditional Google Search ad (text ad), Shopping ads don’t use keywords. Instead, Google pulls data from a Google Merchant Center account, where marketers build, import, and manage their product feeds to determine where and how to show product ads.