What is headless CMS and how do I use it with a modern frontend?

A headless CMS separates content management (the "backend") from content presentation (the "frontend"), delivering content via API to any frontend framework. Traditional CMS (WordPress): content management and display tightly coupled. Headless CMS: editors manage content in admin panel, developers fetch it via REST or GraphQL API to build frontend in React, Next.js, Vue, or any framework. Options: Strapi (open source, self-hosted on Connect Quest VPS), Contentful (SaaS, free tier), Sanity (SaaS + self-host), WordPress itself in headless mode (REST API + React frontend). Benefits: frontend performance (static generation with Next.js), developer freedom (any framework), and multi-channel (same API serves website, mobile app, smart TV). Deploy headless: Strapi on Connect Quest VPS, Next.js frontend on Vercel or same VPS, content delivered globally via CDN. Architecture ideal for Indian EdTech and media companies. Build on Connect Quest infrastructure at connectquest.co.in.