Twitter Tests New, Larger Image Tweet Carousel Ad Format

Twitter began testing a new carousel ad format for app install campaigns, which would give advertisers the capacity to add multiple, larger images to their collections. Now, Twitter is expanding its new carousel format to additional campaign types, and potentially even regular business posts, with H&M USA sharing this tweet, which includes multiple images connected to a common link.  the new format (spotted by social media expert Matt Navarra), includes a larger image panel, and a swipeable carousel stream. The post appears to have been created via an app called 'Carousel-Composer', though there's limited information on the tool available.