The ad says the URL goes to blockchain.info. The URL displayed on mouseover on the link is to a Google redirector, goo.gl/vL2zmr. But when you click the link you go through a few redirectors and end up at blockchain-info.consulpisos.com, which is allegedly a phishing site. It sure looks suspicious; that page goes straight to a “type in your password” page, which the real site hides behind several clicks.
I don’t much care about the Bitcoin part of this, but Google should really not be selling ads with fake URLs on display.