Google.com makes most of its money from paid advertising. When you do a search on Google.com you'll often see listings at the very top and on the right side. Google.com charges money for those listings. Every time someone clicks on those links, the company that is listed gets charged. The amount varies depending on the competition for that particular key phrase that was searched. But I would like to know is it the only way how the Google is making money or there are other areas from where they generate more money?