An edge server is a computing node located geographically closer to end users, often used to cache content, run lightweight logic, or handle network routing. Edge servers reduce latency by bringing resources physically closer to clients. CDNs deploy large networks of edge servers to deliver static assets efficiently. Modern platforms also allow running distributed compute tasks at the edge.
Why it matters
Edge servers significantly improve page load time and reduce bandwidth on origin servers. They help handle traffic spikes and enhance reliability by acting as a buffer between users and core infrastructure. Edge computing enables new patterns like serverless functions at the edge.
Examples
Cloudflare Workers and AWS Lambda@Edge allow developers to run logic at edge locations. The lesson Content Delivery Networks describes how CDNs use edge servers.