Content Delivery Network (CDN).
Learn what Content Delivery Network (CDN) means in modern search and SEO.
A geographically distributed network of servers that caches and delivers web content from locations close to each user.
A Content Delivery Network (CDN) replicates static assets—HTML, CSS, JavaScript, images, fonts—across dozens or hundreds of servers worldwide. When a user requests a resource, the CDN serves it from the nearest edge node, reducing round-trip latency significantly.
CDN and SEO Performance
Faster Time to First Byte (TTFB) and reduced asset transfer times directly improve Core Web Vitals scores. Google uses page experience signals, including load speed, as ranking inputs. CDNs also provide DDoS protection and high availability, reducing downtime that can harm crawl reliability.
Edge Functions and SEO
Modern CDNs such as Cloudflare, Fastly, and Vercel Edge support server-side logic at the edge—enabling personalisation, A/B testing, geo-redirects, and bot detection without adding server round-trip latency. This unlocks dynamic rendering strategies that do not sacrifice speed.
Related Terms
Ready to close the loop?
See every term in action
Aergos tracks your AI and organic visibility across every channel, in one platform.
Not ready to talk? Audit your site free →