Nuke is a compositing software that is used to combine multiple visual elements into a final image or animation sequence. It is used for post-production work, including special effects and colour correction. With Nuke, artists can layer and manipulate different visual elements, such as 3D models, live-action footage and digital effects, to create a seamless final product. Nuke provides a range of tools for keying, tracking, rotoscoping, and compositing as well as support for various file formats and plugins. Its node-based workflow allows for flexibility and efficient collaboration between artists and production teams.