Next.js is a JavaScript framework that is built on top of React.js, which helps developers build web applications. The framework is designed to address the server-side rendering (SSR) challenges faced by React.js. It can operate in both the browser and the server-side environments.

Next.js is an excellent tool for creating optimized landing pages, home pages, and other pages that depend on organic search traffic. These pages will benefit from the features provided by Next.js. RiseServ uses Next.js for applications that require server-side rendering.