get rolling

VERB
11 LETTERS · STARTS WITH G

get rolling is a valid 11-letter word worth 12 points in Scrabble and 17 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
G2E1T1R1O1L1L1I1N1G2
2 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 1 + 2 =12 PTS
DOUBLE WORD → 24TRIPLE WORD → 36
MEANING

What does get rolling mean?