Google AdSense is a feature for web developers to earn money. You can place the Google ads on your site and you earn money when visitors click on the ads.
Types
AdSense comes in many forms. You can place a Google search bar on your site, an ad box on the website in an RSS feed, on mobile websites, within videos or for domains.
Position
You choose where you want to place AdSense on your site using HTML tags. After choosing the dimensions of the ad box, AdSense sends the code to you for implementation.
Formats
The formats of ads includes text, images, links, ad lists, videos or gadgets. You can decide which formats and how many ads to display on you website.
Reports
AdSense also provides reports that you can review, specifying a day or date range. The results show you the number of pages you have ads on, ad units, impressions, clicks, clickthrough rate, effective cost per thousand impressions and earnings.
Payment
AdSense pays based on how the form of payment selected which includes checks, electronic funds transfer, Western Union or Rapida payments. AdSense will only issue payments once an account reaches a minimum threshold, which varies by location.
Source - eHow
