Ruby - What does %w operator do?

Answer 1

Its a literal, it allows you to create array of strings wirh no commas and quotes in syntax.
Example:
array= ['ggg', 'gdtg']
Or
array =%w[ggg gdtg]

It justs helps in syntax.

Answer 2

I know this use, but it's not used exclusively with arrays

Answer 3

Paolo De Nictolis yes indeed.