AdWords offers different types of ad formats for advertisers to target diverse customer segments, including text ads in search results, image and responsive ads on publisher websites, video ads on YouTube, Gmail ads, call only ads, app promotion ads, and shopping ads. The right ad type should be selected based on an advertiser's goals and to best reach their most potential customers, depending on audiences' online media habits. Specific campaign types are needed to use different ad formats, like display network campaigns for image ads.