Amazon CloudFront is a content delivery network (CDN) that can be used to deliver entire websites, including dynamic, static, streaming and interactive content, using a global network of edge locations. CloudFront works seamlessly with AWS services like S3, EC2, and Route53, as well as non-AWS origin servers. It speeds up websites by caching content at edge locations close to users. The document then discusses CloudFront pricing, use cases, and provides an example of how one company used CloudFront to optimize content delivery for their application.