Light Probes vs. Screen Space Reflections in Unity
To create a reflection probe create an empty game object in the scene. Position it where you would like it.
By creating a reflection probe we now can see some reflections from the environment.
The other way, the Screen Space using post-processing is more “expensive”, but the effect is much better with a lot of details from the environment.
For console/pc based gaming, this is a much better choice, as those platforms are better built to handle the expense of these reflections.
Mobile will be the best place to use reflection probes!