Something that Adsense needs

I have been wishing and wishing that Adsense would tell us a few things so we know how to better target our readers. If a reader of one of my websites clicks an advertisement I would like to know what page they were on and what their search was when they found my page. I could find that information myself but it would end up taking a very long time of sifting through the list of site readers who have been to my site to see one that matches the click of an adsense link. If I had this information I would better know how to bring more readers to my site because I would know what ad they clicked and what their search was. Why would this information from adsense do me some good? because well, they where looking for something and they found something, it just was not in my content. If there is a repeated search that leads people to my site and the repeated click of a link, and the item is not on my site but similar, I could then better target that search so more people could find what they are looking for and the ads themself would be better suited for the search.
I could better optimize my post to give th reader what they need and better optimize my SEO for the content I am trying to pass out.