What are Product Listing Ads?
Product Listing (PLA) ads include an image of the product and the merchant name usually on top of the SERP. Hence, if search query matches to an item in your Google Merchant Center account, then Google will trigger the most relevant products with its image, price and product name. Your PLA will be charged as soon as someone clicks on the ad and completes a purchase/ transaction – Cost per action (CPA) basis. Apart from that, PLAs can give your customers a greater user experience and showcase/promote your product.