A CDN, or Content Delivery Network, is like a network of delivery trucks for the internet. It works by storing copies of website content, like images and videos, on servers located in various places around the world. When you visit a website, instead of fetching all the content from one far-away server, the CDN delivers it from a server nearby, like having a package delivered from a local store instead of across the country. This makes websites load faster and more reliably for users, no matter where they are, creating a smoother and more enjoyable online experience for everyone.