While looking at some of my posts i came through an adsense ad which shows IP address instead of a URL, does google change their link policy or what. In Adwords after creating the ads Google editors will check the ads and if they find any violations they will stop the ad and mail us to chage the ad.

Google Display URL Link policy: So as not to mislead users, the display URL should give users a clear idea of the website or landing page to which they will be taken when they click on an ad.