Firestore Real-Time

Firestore (Cloud Firestore) is Google's modern NoSQL database. It stores data in collections (tables) and documents (rows as JSON). Real-time listeners sync data across all connected clients via WebSockets. Supports rich queries (filter, sort, paginate on any field), transactions (atomic multi-document updates), and multi-region replication (data replicated across 5 regions for redundancy). Unlike traditional databases, Firestore scales automatically: 1 user or 1M users, same code. No ops teams needed. Works offline (queues changes, syncs when online).