A Facebook Carousel is an ad format that allows users to swipe through up to 10 photos and videos, similar to flipping through a gallery.
According to Facebook, Carousel ads work far better than other Facebook ads, as they can result in a 30-50% decrease in cost-per-conversion and a 20-30% lower cost-per-click.
The same interactive feature exists on Instagram too as a standard post format, allowing you to make your posts more engaging and dynamic.
Find out how to create Facebook Carousels.