The MERN stack combines MongoDB, Express.js, React, and Node.js to build dynamic full-stack web applications using JavaScript. Enrolling in a MERN Stack Course in Chennai helps students master these technologies through practical training.Express.js plays a crucial role by simplifying backend development, managing APIs, and enabling efficient data handling. By gaining hands-on experience, students can pursue careers as full-stack developers, web application engineers, or software developers. FITA Academy supports learners through expert mentorship, real-time projects, and career-focused placement assistance.