Angular is a popular open-source JavaScript framework developed and maintained by Google. It is designed for building dynamic, single-page web applications (SPAs) and mobile applications. Angular provides a comprehensive set of tools and features that enable developers to create robust and scalable applications.

Key Features of Angular:

TypeScript: Angular is built using TypeScript, a superset of JavaScript that adds static typing and additional features to the language. TypeScript helps catch errors at compile-time and provides better tooling support for large-scale applications.

Component-Based Architecture: Angular follows a component-based architecture, where applications are composed of reusable and self-contained components. 

Two-Way Data Binding: Angular provides a powerful data binding system that allows automatic synchronization of data between the application’s model and view. Changes made in the model are reflected in the view, and vice versa, without manual intervention.

Dependency Injection: Angular has a built-in dependency injection system that helps manage dependencies between different parts of the application. This promotes loose coupling and facilitates testing, reusability, and maintainability.

Routing: Angular offers a powerful routing mechanism for building single-page applications. It allows developers to define different routes and associated components, enabling navigation between views without a full page reload.

Forms and Validation: Angular provides robust support for building forms and performing validation. It includes built-in form controls, validators, and error handling mechanisms, making it easier to create interactive and user-friendly forms.

Reactive Programming: Angular leverages Reactive Extensions for JavaScript (RxJS) to handle asynchronous operations and events. Reactive programming with RxJS enables developers to write clean and concise code for managing streams of data and handling complex scenarios.

Testing: Angular has excellent support for testing, offering tools and utilities for unit testing, component testing, and end-to-end (e2e) testing. It encourages writing testable code and provides a seamless testing experience.

Extensibility and Ecosystem: Angular has a rich ecosystem with numerous third-party libraries, tools, and extensions. It integrates well with other frameworks and libraries, allowing developers to leverage existing solutions and enhance their productivity.

Angular has a strong community support, active development, and regular updates, ensuring the framework stays up-to-date with the latest web development trends. It is widely used by organizations of all sizes to build high-performance and scalable web applications.