Google displays their ads in your websites, which are nothing but blocks of text ads and this ad blocks are called google adsense. You can notice google ads in many websites, which shows "Ads by Google". This programme is free and have both pay per click and pay per impression advertising, means that you get paid for valid clicks on the ads on your site well as impressions on your content pages. This is double benefit for you.

Everyone wants to know this.The best way to find out how much you'll earn is to sign up and start showing ads on your web pages. There is no fees for it, no cost at all, and getting started is quick and easy. The ads you get on your site are cost-per-click (CPC) ads. It means that advertisers pay to Google only when users click on their ads. You'll receive a portion of the amount paid for clicks on Google ads on your website. But nobody can tell the exact amount you will get for each click, you can know it by trying it.