MERN stack is a JavaScript stack used for faster and easier deployment of full-stack web applications. MERN stack comprises the top four programming languages: MongoDB, Express, React, and Node js, which are used to develop premium applications. MERN stack web development is specifically designed to make the process of app development smoother and more accessible.
Each of the four powerful technologies in MERN, MongoDB, Express, React, and Node.js, plays a massive part in developing web applications by providing an end-to-end framework for developers to work in. MERN is one of the many variations of the MEAN stack (MongoDB, Express, Angular, Node), where React JS replaces the Angular front-end framework. MongoDB is a document database, while Express js is a Node.js web framework. React js is a client-side JavaScript framework, whereas Node js is the premier JavaScript web server.