MongoDB is the database backbone of the MEAN Stack—MongoDB, Express.js, Angular, Node.js. As a NoSQL, document-oriented database, it stores data in JSON-like formats, making it flexible and easy to use with JavaScript. Key Roles in MEAN Stack: Data Storage: MongoDB stores application data in flexible documents, perfect for dynamic web apps. Scalability: Supports sharding and ... https://www.skillonit.com/mean-stack-components