Fusion essentially places an entire VFX studio at your fingertips, with keyframe and spline based animation tools for controlling the image effects you apply to your footage over time. You can use the keyframe and spline tools to control the included tools, which include Keying and matte tools, particle tools, and vector paint tools. The included 2D and 3D text tools allow you to create and animate text effects from the simple to Hollywood style effects. Fusion also works in 3D space, allowing you to import 3D scenes and models created in other programs, such as Maya, 3ds Max, and Cinema 4D, and integrate them into your effects work.
Fusion 7 Studio is the paid version of the software, which includes several features that the free version lacks. For example if you want to use third party plugins to augment the included tools you will need to purchase Fusion 7 Studio. Likewise, Stereoscopic support, optical flow tools, which provide more real world frame interpolation, and unlimited render nodes for rendering across a network, also require the Fusion 7 Studio license.