Baobab is a JavaScript/TypeScript library for managing persistent, immutable data trees with cursors. It allows developers to easily navigate and monitor nested data through events, inspired by functional zippers and Om's cursors. The library is designed to provide a centralized model for an application's state and can be paired with React for UI updates. It is particularly useful for developers working with complex state management in JavaScript applications, offering features like computed data nodes (monkeys), history tracking for undo/redo functionality, and efficient change detection through immutability.