Too Long; Didn't Read
CloudFront is a CDN (Content Delivery Network) that retrieves data from the Amazon S3 bucket and distributes it to multiple datacenter locations. The data that delivers through a network of data centers is called edge locations. Instead of the public internet, the content traverses the AWS private network and CloudFront optimizes the TCP handshake. CloudFront will fetch data from CloudFront data centers instead of S3, so the request and content return are still much faster than access across public internet.