In Python, the `__abs__` special method is used to define the behavior of the absolute value (`abs()`) function for objects of a class. When the `abs()` function is called on an object that implements the `__abs__` method, Python internally calls this method to compute the absolute value of the object. The `__abs__` method should return the absolute value of the object, which is typically a non-negative representation of the object's magnitude. This special method allows developers to customize the behavior of the `abs()` function for user-defined objects, enabling them to work with numeric types or custom classes in a consistent and intuitive manner. Implementing the `__abs__` method is particularly useful for mathematical operations and numerical computations involving user-defined types, where having a well-defined absolute value is essential for correct behavior. By defining the `__abs__` method, developers can ensure that their custom objects behave appropriately when used with standard Python functions and operators.