If you use the link ad units for monetizing with adsense, you may have noticed a small addition to the page that users see after clicking on a link unit topic.Adsense Team have recently added an image ad at the end of each of these units,as this showed the improvement of income for many publishers.

These images are contextual ads that are based on linking the user clicks on the subject of the reach of advertising. If no image ads for a particular subject, they will only show the original text of ads there will be no psa served. Advertisers can bid on these image ads on the cost per click (CPC) and cost per impression (CPM), so you can generate earnings for valid clicks and impressions. You can exercise on the image ads on your site by creating a link between the single report on your Advanced Reports page.