A content delivery network (CDN) functions to enhance the delivery and performance of web content by distributing it across multiple servers in various locations. This technology reduces latency and loading times by caching content closer to end-users, improving web performance and reliability. CDNs serve static content, such as images, videos, and scripts, while handling high traffic volumes effectively. They also enhance security through DDoS protection and improve site availability by distributing requests across multiple points of presence (PoPs), ensuring consistent access to content.