A content delivery network (CDN) is a system of distributed servers that work together to deliver web content to users more efficiently. By storing copies of content, such as images, videos, and web pages, in multiple locations around the world, CDNs reduce the distance data must travel. This helps improve loading times and enhances the overall user experience. When a user requests content, the CDN directs them to the nearest server, minimizing latency. This technology is widely used by websites and services, including Netflix, Amazon, and YouTube, to ensure fast and reliable access to their content for users everywhere.