Instagram carousel posts allow users to share multiple photos or videos in a single post. Viewers can swipe through the different media, providing an engaging experience. Carousels are a useful tool for businesses to showcase products, tell a story, provide reviews or tutorials, and increase engagement. They work best when the multiple images are related and complement each other to avoid cluttering the feed. Proper use of hashtags, tags, and captions can help drive traffic and conversions through carousel posts.