Q42: CloudFront Edge Locations & Regional Edge Caches. - AWS Cloud Architecture

In Simple Words:

Edge Locations: 450+ points of presence worldwide that cache content close to end users for ultra-fast load times.
Regional Edge Caches: A larger caching layer sitting between Edge Locations and your origin server to prevent cache misses from overwhelming backend origins.

hcl

resource "aws_cloudfront_distribution" "s3_distribution" {
  origin {
    domain_name = aws_s3_bucket.static_assets.bucket_regional_domain_name
    origin_id   = "S3Origin"
  }
  enabled             = true
  default_root_object = "index.html"
  default_cache_behavior {
    allowed_methods  = ["GET", "HEAD"]
    cached_methods   = ["GET", "HEAD"]
    target_origin_id = "S3Origin"
    viewer_protocol_policy = "redirect-to-https"
  }
}