Can you explain how the join() method works in Python and what it is used for?

The join() method in Python is used to concatenate elements of an iterable (such as a list of strings) into a single string with a specified separator. It is called on the separator string and takes an iterable of str elements.

Example:

words = ['Python', 'is', 'awesome']
result = ' '.join(words)  # Result: 'Python is awesome'

Here, the space ' ' acts as the separator between list elements during concatenation.