Responsiveness is clearly the future of web design, but one little problem with is advertisements. Ad networks, Google AdSense includes, don’t take kindly to you simply hiding them at lower resolutions with
display: none and calling it a day, since the ads still load and register as being displayed. You need to do something smarter.
You can see how to do it in the Labnol post How to Use Google AdSense Ads on your Responsive Website.