In this video, you will explore how to define and call instance methods in Python classes. You will learn that instance methods are functions defined inside a class that operate on individual objects, giving each object meaningful behavior. The video begins with the purpose of instance methods and introduces the `self` parameter, explaining that `self` always refers to the specific instance on which a method is called. You will see how Python automatically passes the object as the first argument when you call a method, so you never need to provide `self` explicitly. 

The video walks through a practical example using a `BankAccount` class. You will see how the `deposit`, `withdraw`, and `summary` methods use `self` to access and modify the account's balance and owner attributes. Step-by-step demonstrations show how calling `account.deposit(50)` updates only that account's balance, highlighting how each object maintains its own state. By the end, you will understand how to define instance methods, why `self` is required as the first parameter, and how to use these methods to interact with object data in real-world scenarios.

To give your objects meaningful behaviors, you define functions inside your class - these are called **instance methods**. Every instance method must include `self` as its first parameter. The `self` argument is a reference to the specific object that the method is being called on. This allows your method to access or modify the attributes that belong to that particular instance.

When you call a method on an object, Python automatically passes the object itself as the first argument to the method, which is why you do not provide `self` explicitly. For example, if you have an object `my_obj` of class `MyClass`, calling `my_obj.do_something()` is equivalent to calling `MyClass.do_something(my_obj)`.

Inside an instance method, you can read or change the object's state by accessing or updating its attributes using `self.attribute_name`. This is what makes instance methods powerful: they operate on the data stored in each object, allowing each instance to behave according to its own state.

What is the role of the `self` parameter in Python instance methods, and why must it be the first parameter?

Defining and Calling Instance Methods