GeoGebra is a dynamic mathematics software that allows users to create and manipulate geometric shapes, algebraic equations, and graphs. It includes a wide range of tools for geometry, algebra, and calculus, as well as statistics and probability. The software also offers an interactive and user-friendly interface, making it easy for students and teachers to use. Additionally, GeoGebra is available for free and can be used on various platforms, including Windows, Mac, and mobile devices.