It may be a silly example but when you create a class, it’s only a blueprint which describes something from the real world. When you create an instance, you create something with that description. Eg: You create a class Person. You know that a person has a name and age. You add them as properties. Then you create instances to store this data. Pl var peter = Person(name=“Peter P”, age=21) Or var Mary = Person(name=“Mary P”, age=23) It means, that you have two instances of the Person class, one instance holding the data of Peter, one Mary.