What is an edge / CDN? Keeping your site close to your users

Lesson 6 of making it real: the speed trick your vibe-coded app already gets for free. Distance costs time, so a CDN keeps copies of your site on… Aliteq Sam Ortega · Build Editor

The edge is servers near your users; a CDN is a network of them

Serving from nearby cuts the distance a request travels, so pages load faster

Public content caches at the edge; private, per-user data must not

On most hosts, your images, CSS and public pages are cached at the edge automatically, for free; that's most of your speed. Private or personalised responses are (correctly) not cached, so don't try…

What this means for your app

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