According to the official AdSense blog report, Google adsense has modified the content of the advertising unit of the click Format, the original format is the mouse on the entire area can be clicked, the new format is the mouse only placed in the hyperlink place to click.
According to Google, the reason for this is to improve the advertising user experience, reduce the number of delays, to ensure that the AdWords users only pay for effective clicks, by reducing the occasional click, to increase the value and satisfaction of the Advertising Alliance, encourage publishers more consumption.
From these days my AdSense data, adsense Click Rate seems to drop a little, but ECPM seems to have not been improved, but has been reduced, in general, Google AdSense implementation of this set of "improve the user experience" strategy, These days my AdSense advertising revenue in this month the lowest days.
Of course, the impact of this change cannot be determined from just a few days of data, but I think, for those who are not familiar with the knowledge of the network, the new advertising format may make the user can not find the place to click, resulting in a drop in overall advertising clicks, but we can not deny that those who do not know the network of users, May be the most easily consumed group of users, which may also be a loss for advertisers.