MongoDB is a NoSQL database that provides flexible data storage layers, and Node.js keeps your server running continuously. It harnesses the potential for a faster computer network. Express.js standardizes web application development and Angular.js allows interactive gestures on web applications. Together, they form the MEAN stack. Developers, who realized the LAMP stack (Linux, Apache, MySQL, and PHP) is not flexible enough to serve their purposes, are gradually making a move towards the MEAN stack. And it’s high time you should too. There are many reasons to do so.