Database systems that don't use traditional SQL structure, designed for flexible data storage. Like having different filing systems optimized for different types of information.
Social media platforms use NoSQL databases to store user posts, photos, and interactions in flexible formats.
These are managed NoSQL database services. DynamoDB and Oracle NoSQL Database are key-value/document-oriented services; Cosmos DB is a multi-model NoSQL service (document, key-value, graph, column-family via APIs); Firestore is a document NoSQL database commonly used for web/mobile apps with real-time sync.