What Does Static Members Mean?
Static members are data members (variables) or methods that belong to a static or a non static class itself, rather than to objects of the class. Static members always remain the same, regardless of where and how they are used. Because static members are associated with the class, it is not necessary to create an instance of that class to invoke them.
Techopedia Explains Static Members
A static member class cannot have the same name as any of its enclosing classes. Static member classes and interfaces can be defined only within top-level classes and other static member classes and interfaces.