A content management system that stores and edits content but has no front end of its own: it delivers content through an API to a website, a mobile app, or any other channel.
It separates content from presentation, so the same material feeds several products and a redesign does not mean migrating the content again. It also keeps the public site fast, because rendering is not tied to the CMS.
We pair a headless CMS with a Next.js front end, define content models with the editors who will use them, and set up preview so authors see exactly how a draft will look before publishing.