What is Carousel?
A carousel is the post format with more than one piece in the same place: the viewer swipes to see the next slide. Instagram allows up to 20 images or videos; on LinkedIn the carousel is a multi-page PDF. It is the format that holds attention longest in the feed, because every slide is a reason to keep going, and the algorithm often shows the post again, on the next slide, to people who did not swipe. It works well for tutorials, lists, before-and-after and any story with a beginning, middle and end.