As busuu.com is an website the best way to make it know is on the web. So it could be a good idea to put some ads on it.
As busuu.com is a good website that make it possible to learn different languages, I think the target public is very big:
- the young because they have to learn another language than their own
- the worker because they often need another language
- and the old because they want to do something new.
So poster of busuu.com should be put on schools, office and so on... .
How would you advertise busuu.com?