1. **IDE for JavaScript:** WebStorm is a powerful integrated development environment (IDE) specifically designed for JavaScript, including Node.js, React, Angular, and more.

2. **Smart Code Assistance:** Offers intelligent coding assistance, error detection, and suggestions to enhance developer productivity.

3. **Built-in Tools:** Integrated tools for debugging, testing, and version control streamline the development process.

4. **Web Technologies Support:** Extensive support for modern web technologies like HTML, CSS, and popular frameworks.

5. **Live Edit:** Allows real-time editing and previewing of code changes without manual browser refresh.

6. **Code Navigation:** Efficient code navigation with features like Go to Definition, Find Usages, and more.

7. **Intelligent Refactoring:** Simplifies code maintenance with smart refactoring tools.

8. **Code Quality Tools:** Built-in tools for code inspections, test running, and profiling contribute to code quality.

9. **Cross-Platform:** Available on Windows, macOS, and Linux, ensuring a consistent development experience.

10. **Extensibility:** Supports a wide range of plugins to customize and extend functionality based on project needs.