A content delivery network (CDN) is a distributed network of servers that can efficiently deliver web content to users. CDNs store cached content on edge servers in point-of-presence (POP) locations that are close to end users, to minimize latency.
The benefits of using Azure CDN to deliver web site assets include:
Better performance and improved user experience for end users, especially when using applications in which multiple round-trips are required to load content.
Large scaling to better handle instantaneous high loads, such as the start of a product launch event.
Distribution of user requests and serving of content directly from edge servers so that less traffic is sent to the origin server.