The below description is taken from LEGO.com.
“Monster here to help!”
He may look a little alarming, but The Monster just wants to help everybody out. It’s really not his fault that he was constructed with tremendous strength and always ends up accidentally smashing everything around him into lots and lots of little bricks.
Whenever The Monster sees somebody struggling with a heavy load or trying to stack the last piece up on top of a wall, of course he runs right over to lend an enthusiastic helping hand. And no matter how many people may scream and run away, or how many building projects he may accidentally destroy, he always stays just as cheerful and friendly as the day he was first put together!