In Python, objects can be either mutable or immutable.
An object is considered immutable if its state cannot be modified after it is created. For example, int, float, bool, and tuple are immutable types in Python. Once you create an int object with the value of 42, for example, you cannot change its value to 43. Instead, you would have to create a new int object with the value of 43.
A mutable object, on the other hand, can have its state modified after it is created. Examples of mutable types in Python include list, dict, and set. Once you create a list object with the elements [1, 2, 3], for example, you can modify its elements by adding, removing, or changing values.
It's important to be aware of the mutability or immutability of objects, as it can affect how they are passed between functions, how they are compared to other objects, and how they are used in certain operations.