Powering Your App With a Real-Time Messaging CDN

CDN — Content Delivery Network
Let’s start with defining a CDN. A content delivery network (CDN) is a system of distributed servers that traditionally delivers web content to a user, based on the geographic locations of the user, the origin of the webpage and the content delivery server. I use the term traditionally because we’re entering an era where CDNs are doing more than just delivering web content.
An example would be Cloudflare Workers, which lets you use their CDN to run code at the edge, rather than just serve web pages/cached content. You are basically able to deploy and run JavaScript away from the origin server — allowing you to decouple code from a user’s device. According to Cloudflare, “these Workers also enable programmatic functionality for routing, filtering and responding to HTTP requests that would otherwise need to be run on a customer’s server at the origin.”

Link: https://dzone.com/articles/powering-your-app-with-a-realtime-messaging-cdn