Final answer:
Amazon CloudFront uses Edge locations to cache content for faster delivery to users worldwide, enhancing response times by storing content closer to users.
Step-by-step explanation:
The site that Amazon CloudFront uses to cache copies of content for faster delivery to users at any location is Edge locations. Amazon CloudFront is a content delivery network (CDN) service that securely delivers data, videos, applications, and APIs to customers globally with low latency and high transfer speeds. Edge locations are sites spread around the world that CloudFront uses to cache copies of your content closer to your users to improve response times.