Google Adsense seems to be testing new interactive ad units which consist of targeted keyword links beneath the usual Adsense links. I spotted it on a 468×60 Google Adsense unit on a website and got some screenshots…
The keyword links inside the Google Adsense unit are interactive. I was tempted to click the link (not on my site) to see what happened. I clicked on the first link “IP Lookup” and I got the ad below.
Since I got another unit with changed ads and new keyword links, I decided to click the first link again to see if the process continued forever, but then I got a usual Adsense unit without any links as below.
If you perform a mouse gesture for “back” on your mouse, you can easily browse back to the second and then the first ad unit without reloading the page! And this is not always a 3 step process, you can get the normal ad on the first click too.
It seems this Interactive adsense unit is a mix of the Link units and regular text ads unit. Clicking on these suggested links simply makes the units more targeted to the user needs and I assume the Adsense publisher earns money only when you actually click the text link ads. These links add to the clutter, but you never know when it becomes a regular features. All strange Adsense spottings become new features some day… if they work well.