This property of Lie bracket attracts me a lot. $$ [AB,C]=A[B,C]+[A,C]B. $$ It looks similar to the product rule of differentiation $$ (uv)'=u'v+v'u $$ The product rule can be used to define the derivative on real and complex manifolds. So I think Lie brackets can define derivatives as well. However, I struggle to find a detailed definition of derivative via Lie bracket. That $C$ is quite annoying. I need some reference to learn this definition.
And why $G'=[G,G]$ is called the derived subgroup of $G$?
It is a derivative of sorts: lie bracket of vector fields.