Content Delivery Network

A content delivery network (CDN) is a group of geographically distributed servers that speed up the delivery of web content by bringing it closer to where users are.

-- https://www.akamai.com/our-thinking/cdn/what-is-a-cdn#:~:text=A%20content%20delivery%20network%20(CDN,closer%20to%20where%20users%20are.