A 3D viewer on your PC can be a valuable tool depending on your needs and interests. If you work with 3D graphics, such as in architecture, engineering, or 3D design, having a 3D viewer installed on your PC can be essential for viewing and manipulating 3D models. It allows you to rotate, zoom in, and examine the details of complex 3D models, helping you to visualize and understand the design better. However, for everyday computer use, a 3D viewer may not be necessary. Most standard applications and software do not require a 3D viewer to function, and unless you specifically work with 3D modeling or design, you may not need to install one. Additionally, many websites and online platforms offer 3D models and graphics in a format that can be viewed without the need for a standalone 3D viewer. If you occasionally encounter 3D models or graphics, there are also online tools and plugins that can help you view them without the need for dedicated software. However, if you are interested in exploring and interacting with 3D content as a hobby or for entertainment, having a 3D viewer on your PC can enhance your experience. It allows you to explore virtual environments, view 3D artwork, and play interactive 3D games. Some popular 3D viewers include Autodesk's FBX Review, Blender, and SketchUp Viewer, each offering unique features tailored to different needs and preferences. Ultimately, the need for a 3D viewer on your PC depends on your specific requirements and interests. If you work with 3D graphics or design, having a dedicated 3D viewer can significantly improve your workflow and productivity. However, for general computer use, it may not be essential. Consider your professional and personal usage to determine if installing a 3D viewer on your PC is necessary for you.