concentrate on

VERB
14 LETTERS · STARTS WITH C

concentrate on is a valid 14-letter word worth 17 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3O1N1C3E1N1T1R1A1T1E1O1N1
3 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 =17 PTS
DOUBLE WORD → 34TRIPLE WORD → 51
MEANING

What does concentrate on mean?