It is Google's display ad server, Doubleclick is a service related to Google AdWords. Running ads on this forum is what pays the bills to keep it running.
Main suggestion would be to not use IE as that is a horrible browser. I personally prefer Chrome, though with Firefox you can do the "ad-blocker" add on and it should prevent ads from displaying anytime you browse any site.
Main suggestion would be to not use IE as that is a horrible browser. I personally prefer Chrome, though with Firefox you can do the "ad-blocker" add on and it should prevent ads from displaying anytime you browse any site.