Video narration
A Content Delivery Network, or CDN, is a system of servers that helps websites and apps deliver content faster. Instead of sending every image, video, or file from one central “origin” server, a CDN stores cached copies on many servers placed around the world, often called edge locations. When a user requests content, the CDN routes them to a nearby edge server, so the data travels a shorter distance. That usually means lower latency and quicker loading. It also reduces traffic and workload on the origin server, since the CDN handles many repeat requests. And because the content is spread across multiple locations, reliability improves: if one edge has an issue, another can serve the same cached content. In systems design terms, a CDN is a distribution layer that makes delivery faster and more resilient at scale.