Tkinter is Python's de-facto standard GUI (Graphical User Interface) package, helping build GUIs in several ways:

1. Simple and Easy-to-Use: Tkinter provides a simple and intuitive API for building GUIs, making it accessible to developers of all skill levels.

2. Rapid Prototyping: Tkinter enables rapid prototyping, allowing developers to quickly create and test GUI applications.

3. Cross-Platform: Tkinter applications run on multiple platforms, including Windows, macOS, and Linux.

4. Extensive Widget Library: Tkinter offers a wide range of pre-built widgets, such as buttons, labels, text entries, and menus.

5. Event-Driven Programming: Tkinter supports event-driven programming, enabling developers to respond to user interactions.

6. Customizable: Tkinter allows for customization of widgets and applications through various options and configurations.

7. Extensive Community Support: Tkinter has a large and active community, providing numerous resources, tutorials, and examples.

8. Integration with Python: Tkinter is a built-in Python library, ensuring seamless integration with Python's syntax and ecosystem.

9. Lightweight: Tkinter is relatively lightweight compared to other GUI libraries, making it suitable for smaller applications.

10. Free and Open-Source: Tkinter is free and open-source, reducing development costs and allowing for modifications and customizations.

By leveraging Tkinter's features, developers can quickly and easily build functional and user-friendly GUI applications in Python.