The main advantage of using a content delivery network (CDN) is enhanced performance for users accessing web content. A CDN distributes copies of web assets across multiple geographically dispersed servers, allowing users to download content from the nearest location. This decreases loading times and reduces latency, improving the overall user experience. Additionally, CDNs enhance reliability by providing load balancing and mitigating traffic spikes, ensuring that content remains accessible even during high-demand periods. Furthermore, CDNs contribute to improved security through DDoS protection and secure connection protocols.