CDN (Content Delivery Network)
Sitecheck Team
How CDNs deliver static and cached content from edge locations to improve speed and reliability.
A CDN (Content Delivery Network) caches and serves static or cacheable resources from geographically distributed edge locations, reducing latency and improving resilience for users worldwide.
Why it matters: CDNs reduce TTFB and improve global page load times, which benefits Core Web Vitals, lowers origin load, and improves geographic SEO performance.
Quick tips:
- Cache immutable assets for long periods; use cache-control headers correctly.
- Use region-aware routing and a reliable purge strategy for updates.
- Consider edge functions for lightweight personalization while keeping cacheability.
See also: sitemap.xml, Canonical Tag.