Difference between list<Observer*>* and list<Observer*> in C++ [closed]

list is one of the many classes provided by the Standard Library.

It behaves like any other class type:

int               : integer 
int*              : pointer to integer
Observer          : Observer instance
Observer*         : pointer to Observer instance
list<Observer>    : list of Observers
list<Observer*>*  : pointer to list of pointers to Observers