Content Delivery Networks (CDNs) enhance global content delivery by reducing the distance between users and website resources through a distributed server network known as PoPs. When a user requests content, the CDN routes the request to the nearest server, minimizing latency and improving load times. Advanced caching mechanisms store both static and dynamic content for faster delivery, using policies like TTL, cache tags, and instant purging. CDNs also offer traffic management, DDoS protection, and mobile-specific optimizations such as adaptive bitrate streaming and image compression. Performance improvements, including reduced TTFB and faster page load times, often result in 30-50% better speed, particularly for international users.