Hi Stelle, some babies are just droolers. My baby drooled from about that age and now at 2 and a half he is still dribbling! I found it worse when he was teething but he's pretty much always drooled. Not much you can do I'm afraid.
What does it mean? Nothing. Babies don't learn to swallow their saliva until 2 or 3. I'm sure you've seen plenty of babies and toddlers wandering around with a dripping chin lol.
It's quite common at that age. It might continue to 2.5 like Yellow Digger said or it might not. You just don't know. They usually start chewing on their hands at this age too and there's lot of drool happening!