How does Google gain revenue?

The revenue that Google gains comes completely from advertisement. Google has got thousands of advertisers that buy sponsored links or ‘Adwords’. These two are the different ways of advertisements that Google uses. Sponsored links are placed above the page with the search results and are always clearly identified. Google does not change the search results. The second way of advertisement on Google is by using ‘Adwords’. These are keywords you can buy which will be used to categorize your advertisement. The advertisements will only appear on pages that are related to the clients field. The prices of the keywords vary a bit like the stock market. If much clients want the same keyword, the price goes up.