need explanation

16 LETTERS · STARTS WITH N

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

SCRABBLE WORDS WITH FRIENDS

N1E1E1D2E1X8P3L1A1N1A1T1I1O1N1

1 + 1 + 1 + 2 + 0 + 1 + 8 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =25 PTS

DOUBLE WORD → 50TRIPLE WORD → 75

MEANING

What does need explanation mean?