# Concepts

* [What is Spatial Mapping?](https://www.xrdev.app/mixed-reality-docs/lessons/lesson-10/concepts/spatial-mapping)
* [What is Scene Understanding? ](https://www.xrdev.app/mixed-reality-docs/lessons/lesson-10/concepts/scene-understanding)
* [What are SceneQuads? ](https://www.xrdev.app/mixed-reality-docs/lessons/lesson-10/concepts/what-is-scenequads)
* [How to decide to use Spatial Mapping or Scene Understanding?](https://www.xrdev.app/mixed-reality-docs/lessons/lesson-10/concepts/how-to-decide-to-use-spatial-map-or-scene-understanding)