What is RefCounted in Godot? And why is it important?

RefCounted is a way of memory management which is widely used in programming especially in games. C++ standard library has implement this method (shared_ptr, make_shared) But godot has it's own way of memory management which I explain in this video entire playlist: https://www.youtube.com/watch?v=q2-dbwdTvck&list=PLhixpuPeRv9aDdsZbhTpsXguYRvMgyVQ-