invisible helper

16 LETTERS · STARTS WITH I

invisible helper is a valid 16-letter word worth 25 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1V4I1S1I1B3L1E1H4E1L1P3E1R1

1 + 1 + 4 + 1 + 1 + 1 + 3 + 1 + 1 + 0 + 4 + 1 + 1 + 3 + 1 + 1 =25 PTS

DOUBLE WORD → 50TRIPLE WORD → 75

MEANING

What does invisible helper mean?