For example… just today…
I have the following: Scene, Camera, Cube and Material (for the cube, Red).
In the upper toolbar, I click (Scene) Full Copy.
Now… I have new stuff: Scene.001, Camera.001 and Cube.001. But the same Material .
This surprised me and made me happy, because I thought that if I changed the Material in Scene.001, that I would have to make the same change again in Scene.
Something new, very cool.
Happy Blendering!