Content Delivery

Push bytes to the network edge so requests terminate close to the user and never reach the origin. A CDN is the outermost cache layer of a system: get it right and most static/media traffic and a chunk of latency vanish before they hit your servers; get it wrong and you serve stale assets, leak origin load, or pay egress twice.

When to reach for this

The same files (images, video, JS/CSS bundles, downloads, fonts) are read repeatedly by a geographically spread audience; the origin or its bandwidth is the bottleneck for static reads; or cross-region latency on first byte hurts (a cross-continent round trip is ~100 ms — see back-of-the-envelope). A CDN buys latency and origin offload at once.