AutoCAD Plant 3D is a specialized software designed for professionals in the plant and process industry. It enables users to design, model and document process plants in 3D, allowing for efficient design, collaboration, and communication between design teams and stakeholders. The software offers various features such as piping, equipment, structure modeling, and isometric and orthographic drawing production. It is a valuable tool for creating accurate plant layouts and piping designs, reducing errors, and improving project delivery timelines.