There Is No Google Adsense Secret
There is no Google Adsense secret, It allows advertisers and publishers to place ads on a website. The owner can choose between text and graphic format.
Advertisers are going with text ads in large numbers because people seem to click on text ads more often. They tend to ignore banner advertising. Text based ads are considered lass intrusive than the alternative.
Text ads are not forced upon surfers. Though text ads are less intrusive some people will not see them at all. But the surfers that do see them tend to click on them. Text ads offer information as well, they can be a great learning tool for surfers and potential customers. A little bit of information tends to wet their appetite then they will click on the ad to learn more.