What is "instance" of an object?

Answer 1

First, you define an object (using an object constructor):

function Person(firstName, lastName, age) {
this.firstName = firstName;
this.lastName = lastName;
this.age = age;
}

Now, you may create as many as you need of "real" persons using that object constructor and each person would be a new "instance" of the object 'Person':

var john = new Person("John", "Doe", 45);

Answer 2

bom dia 🐄🐵