This module is one of the four components of the Jahia Nextjs initiative. When used in combination with the nextjs SDK, allows content authors to have a WYSWYG experience when editing websites built with Next.js.
From a technical point of view, It is a servlet proxy used by Jahia to render Nextjs application inside Jahia. That means you can edit, compose and preview website rendered with the Nextjs framework. This module is used in conjunction with the headless-templatesSet module.
For more information about this modules visit https://github.com/Jahia/nextjs-proxy.