CDN (Content Delivery Network)

A CDN is a network of servers spread across the world that work together to deliver website content faster.

Normally, when you visit a website, your browser talks to one server in one location. If that server is far away, the website loads slowly. A CDN solves this by copying the website to many servers around the world. When you visit, you get the data from the server closest to you.

It is like having a book in a central library versus having copies in local libraries everywhere. The local copy is always faster to reach.

Cloudflare, where I host this site, operates one of the largest CDNs. It is part of why the site loads fast everywhere in the world.