main feature

12 LETTERS · STARTS WITH M

main feature is a valid 12-letter word worth 16 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

M3A1I1N1F4E1A1T1U1R1E1

3 + 1 + 1 + 1 + 0 + 4 + 1 + 1 + 1 + 1 + 1 + 1 =16 PTS

DOUBLE WORD → 32TRIPLE WORD → 48

MEANING

What does main feature mean?