What is Amazon CloudFront?

CloudFront is a Content Delivery Network (CDN) that delivers data, videos, applications, and APIs globally with low latency. It caches content at edge locations close to users. When a user requests content, CloudFront serves it from the nearest edge location. If the content isn't cached there, CloudFront retrieves it from the origin (like S3 or EC2) and caches it for future requests.