If you sell a large number of products and would like to automate the process of creating and managing AdWords ads, you could benefit from a new campaign type called Dynamic Search Ads. You do not need to pick keywords or write unique ads with custom landing pages for your various products, and you don't need to pause products that are out of stock. AdWords does this work automatically for you, matching up the appropriate keywords to the most relevant landing pages based on your website's content.