MEAN is an abbreviation of MongoDB, Express.js, AngularJS, and Node.js. It is a free and open-source JavaScript software stack for building dynamic web sites and web applications. MEAN applications can be written in only one language for both server-side and client-side for execution. Uses of Mean Stack- 1. Use to develop web applications 2. Uses for the Front-end as well as Back-end 3. Uses for building dynamic websites and applications. 4. Easy application testing on the cloud platform 5. For adding extra information with simplicity.