Yes, MERN is a full stack, following the traditional three-tier architectural pattern, including the front-end display tier (React.js), application tier (Express.js and Node.js), and database tier (MongoDB).

MERN stack is an easy to learn, easy to implement full technology stack, which could prove to be convenient to beginners. MERN stack requires developers to have knowledge about only one programming language, i.e. JavaScript. Since MERN stack has a well-defined structure, developers can start building applications quickly and easily.

MERN stands for MongoDB, Express.js, React.js and Node.js. the four technologies forming a full technology stack, for building scalable and robust JSON (JavaScript) based web and mobile applications.