For much of its early life, Google had no business model to speak of. Google was once a maddeningly unprofitable company, fumbling left and right for a stable revenue source. After making marginally profitable forays into selling search appliances to businesses and its own search technology to other search engines, Google radically changed course.
the company launched its AdWords program which allowed businesses to advertise to people searching for things on Google.com. Almost overnight, Google took the leap from popular search tool to advertising juggernaut