A content management system where the backend (content repository) is entirely separated from the frontend (the presentation layer).
Traditional CMS platforms like WordPress tightly couple your content with how it looks (themes). A Headless CMS decouples them, acting simply as a database that delivers content via an API. This allows developers to build ultra-fast, highly secure custom frontends (using modern frameworks like React or Astro) while marketers still get a user-friendly dashboard to write and manage content. This architecture is perfect for businesses that need to publish the same content across a website, a mobile app, and a smartwatch simultaneously.