If I create a mesh or material using Instantiate, then assign it to a GameObject, do I then need to call Destroy on the mesh reference I have left, or on the mesh attached to the gameObject, or both? i.e.

Material m = Instantiate(material);
go.renderer.material = m;
// ?
Destroy(m);

// later... when gameObject is destroyed?
Destroy(go.renderer.material);

Is there any difference to this when using new to create the mesh / material instead?

Is there any difference if I assign it to sharedMaterial instead?

If doing this in the Editor, not while the application is playing should I call DestroyImmediate(m); once the material is assigned?