In programming, there may be some situation in which the current method ends up while handling some exceptions. But the method may require some additional steps before its termination, like closing a file or a network and so on.

So, in order to handle these situations, Python provides a keyword finally, which is always executed after try and except blocks. The finally block always executes after normal termination of try block or after try block terminates due to some exception.

In Python, finally is a keyword used in exception handling to specify a block of code that will be executed no matter whether an exception occurs or not.

The finally block is placed after the try and except blocks, and it will always be executed, regardless of whether an exception is raised or not. This makes it useful for cleaning up resources such as closing files, releasing locks, or closing network connections.

Here is an example of how the finally block works in Python: 

try:
    # some code that may raise an exception
except Exception:
    # handle the exception
finally:
    # code that will always be executed, even if an exception was raised

In this example, the try block contains code that may raise an exception, and the except block handles any exceptions that are raised. The finally block contains code that will always be executed, even if an exception was raised and handled in the except block.

In summary, the finally keyword in Python is used to specify a block of code that will always be executed, regardless of whether an exception is raised or not, and it is commonly used for resource cleanup.