a long time ago, little A wrote an article, it is said that do not want to do more than Google Adsense advertising, to the best location for the first ad unit. This was confirmed in a recent article in Adsense’s official blog.
Adsense official blog article called "the first advertising unit", the full text is as follows:
as you may already know, an effective way to increase your AdSense income is to place multiple ad units on a rich web page. There is also a way to maximize your revenue from using multiple ad units, which is to ensure that the highest click rate is the first unit in your web page HTML code. May be a lot of publishers do not understand why this can increase revenue, the following explanation of how our system in the page configuration advertising.
at present, the front page of the advertising unit is always the first to show the highest advertising. At the same time, if you don’t have enough ads on your site, the first ad unit will give priority to advertising. This is why we have been suggesting that you use custom channels to track the effectiveness of each ad unit, to find the highest rate of the ad unit, and in the HTML code to put the ad unit in the front.
here we call "the first advertising unit" refers to the first in the web page HTML code advertising code. Note that the first ad unit in the source code is not always the first ad unit that users see in the browser. For example, if you use the DIV tag in the code to set up, our system is also possible to the bottom of the page advertising unit as the first advertising unit.
now you know how to get more income through multiple ad units, try it.
so, we put in the time, do not put the code inside the site is finished, but also further optimization, so as to increase revenue. (commissioning editor admin01)