The "super" keyword in JavaScript is used to call methods on a parent class, and it should be called within the constructor method of the child class, before using the "this" keyword, otherwise it will result in a reference error, stating that "this is not _________.

The "super" keyword in JavaScript is used to call methods on a parent class within the constructor method of the child class. If it is not called before using the "this" keyword, it will result in a reference error, stating that "this is not a function." This highlights the importance of calling "super" before accessing the properties and methods of the parent class.