How can Google get profits with providing a free researching system for us?

James: How can Google get profits with providing a free researching system for us?
I was just wondering how can Google get profits by providing us a free researching system. We pay nothing and the google allows us to search free. How does it work??
Thank you

Answers and Views:

Answer by cosmicwindwalker
same as any other server – advertising – they are compiling lots of information – better then any other search engine.

Answer by elpasi2
Google gets its revenue from the advertising market – providing ads above and beside searches, and using tracking cookies to know what you search for and the sites you go on to serve you targeted ads that you are more likely to click on and buy through.

Answer by Ducking the Fog
They sell ads. You may see them at the top of your search results labeled “Sponsored Links”, and along the side of the page. You may also notice the “Ads by Goooooogle” on websites all over the ‘net. Of course. Smart people use Firefox with AdBlock plus and never see ads.