A carousel, also commonly referred to as a gallery, equates to an album-style photo post. On Instagram, users can post a sequence of photos in a single post for followers to scroll through; this sequence is a photo carousel. In essence, a carousel combines photos and videos into a small album added to a single post. By tapping a user-friendly, layered square icon, users can simply select photos and videos from their photo albums, caption the post, and share with their following.