Google : free or payant service ???

Can we say that Google give or sell their product?

If we think that Google don't sell their product, we can ask us the question : how do Google make to be profitable and to be apperead in stock exchange?

Perhaps for the cybernauts, Google offers their service and we can think that all is free. In popular imagination, Google seems to participate to the new world of Internet : no money and echange and communications for all.

But for organizations and societies, this isn't really the same thing. If you want to appear on the pages of Google, you must pay some money !!!