An Instagram carousel is a post that allows you to share multiple photos or videos in a single post, which users can swipe through to view each one. It's like a digital slideshow! You can add up to 10 photos or videos to a carousel post, and each one can have its own caption, hashtags, and tags. When you post a carousel, Instagram displays the first photo or video, and users can swipe left to view the next one, and so on. It's a great way to share multiple images or tell a story in a single post!