CDN (Content Delivery Network).

A CDN (Content Delivery Network) is a global network of servers that delivers static website resources — images, CSS, JavaScript, videos — as close to the user as possible. Without a CDN, every visitor to your website loads all content from the same server (e.g., in Zurich). With a CDN, a data center in Frankfurt, London, or New York delivers this content — depending on where the visitor is located. This reduces latency and dramatically improves loading time.

CDNs are essential for good Core Web Vitals: They reduce TTFB (Time to First Byte), improve LCP (Largest Contentful Paint), and ensure consistent performance worldwide. Leading CDN providers are Cloudflare (with a free basic plan), AWS CloudFront, Fastly, and Vercel Edge Network. Many modern hosting solutions like Vercel or Netlify integrate CDN automatically.

For Swiss companies, a CDN is particularly important when you target international customers or your server is located in Switzerland (where hosting is expensive). Whether a CDN is put in front is decided per project: for a website whose visitors almost all come from Switzerland, it brings less than for an international audience. The result: equally fast loading times from Zurich, Geneva, London, or New York.