Sorry in advance if this is extremely common and I've just been living under a rock for a while.. I was recently updating my laptop site, and I noticed a new form of a google ad I had not previously seen in my skyscraper position - it looked normal for the top 4 ads, but then the bottom position said "Change to ads about", and had links for a few new ad categories ... a bit like a link unit. I of course did not click on the unit so as to avoid click fraud. I'm not sure what actually would happen if a user clicked on one of these links, if it would be a new ad page like a link unit, or if it would just refresh the skyscraper... I captured a screenshot of the ad here. (I hope this isn't against any TOS of anywhere - I'll take it down immediately if so) Anyone seen/clicked this before, and if so, does clicking on one of those categories give you a new ads page, or does it just refresh the skyscraper portion of the page with new ads? Thanks!
I saw that few times before. From my understanding, when the ad inventory is large, the ads are categorised and an option to change the ads are displayed.