Nuxt is the meta-framework for Vue (the equivalent of Next.js for React). It adds server-side rendering (SSR), file-based routing, and full-stack capabilities on top of Vue — turning Vue from a client-side library into a complete application framework.
The core problem SSR solves
Plain Vue SPA: server sends an empty <div id="app"></div> + JS bundle
→ browser downloads JS, runs Vue, THEN renders content
→ slow first paint, and crawlers may see a blank page (bad SEO)
Nuxt SSR: server renders the full HTML and sends it ready-to-view
→ fast first paint, content visible immediately, great SEO
→ Vue then "hydrates" it to make it interactive
