Next.js 15 with 55 Million Dynamic Pages: SSR, SEO, and Performance

The article explains how CNPJ Aberto uses Next.js 15 to serve a unique page for each Brazilian company at massive scale.

It relies on Server Components, on-demand SSR, and generateMetadata to set custom title, description, OpenGraph image, JSON-LD, and canonical URL on the server.

This approach avoids the limits of SSG and client-side rendering when dealing with tens of millions of pages.

React cache helps prevent duplicate requests and supports more efficient server-side rendering.

The result is better SEO, correct social sharing metadata, and lower build costs for large dynamic content.