If you want to have a URL for your FastDL (sv_downloadurl) go to your control panel > your server > navigate to "Server Information" > click on "FastDL"
A Content Delivery Network (CDN) is a distributed network of servers that work together to deliver internet content, such as web pages, images, videos, and other resources, to users based on their geographic location.
A CDN can help improve performance, reduce latency, and enhance the overall user experience by caching content closer to the end-users, thereby speeding up content delivery and reducing server load. Additionally, it can provide better reliability and scalability, especially during traffic spikes or DDoS attacks.