We have always believed it’s important for everyone to have free access to the best information. Ads enable Google to provide a free Search engine — one that works just as well for anyone, regardless of education or income.
We work hard to display ads only when they are relevant to the task you are trying to achieve on Google. We only charge advertisers when users interact with the ad, so our interest is in showing only useful ads. In fact, we frequently run no ads at all.