What exactly does the .join() method do?

Question

I\'m pretty new to Python and am completely confused by .join() which I have read is the preferred method for concatenating strings.

I tried:

Answer 1

There is a good explanation of why it is costly to use + for concatenating a large number of strings here

Plus operator is perfectly fine solution to concatenate two Python strings. But if you keep adding more than two strings (n > 25) , you might want to think something else.

''.join([a, b, c]) trick is a performance optimization.