The 3D Viewer from Microsoft is a tool that allows users to open and interact with 3D models on their Windows devices. It supports a wide range of 3D model file formats and provides various viewing and manipulation options for the models.

Whether you need the 3D Viewer depends on your specific requirements and usage. If you frequently work with 3D models, such as architects, designers, or engineers, having a dedicated viewer for 3D models can be beneficial. The 3D Viewer provides a simple and intuitive way to visualize and review 3D models without the need for specialized software.

Additionally, if you use applications and programs that generate or utilize 3D models, having the 3D Viewer installed can streamline your workflow. It allows you to easily open and view 3D models without needing to rely on third-party viewers or complex software.

On the other hand, if you rarely encounter 3D models or have no need to interact with them, the 3D Viewer may not be necessary for you. It's important to consider whether having the 3D Viewer will add value to your daily tasks and activities.

Furthermore, it's worth noting that there are alternative 3D viewers available, both from Microsoft and other developers. You may already have a viewer for 3D models installed on your device, or there may be other options that better suit your specific needs. It's advisable to explore different viewers and choose the one that provides the features and compatibility you require.

In conclusion, whether you need the 3D Viewer from Microsoft depends on your usage of 3D models and your workflow. If you frequently work with 3D models or use software that generates or utilizes them, having a dedicated 3D viewer can be beneficial. However, if you rarely encounter 3D models or have alternative viewers that meet your needs, the 3D Viewer may not be necessary for you.