The Performance reports tab at www.google.com/adsense is designed to provide more insight into not just how much you're earning, but what impacts those earnings.
If your blog is responsive and you've placed responsive adsense ad codes on it, you can track the performance of your responsive ad units by viewing the Ad units report on the Performance reports tab.
If your blog is responsive and you've placed responsive adsense ad codes on it, you can track the performance of your responsive ad units by viewing the Ad units report on the Performance reports tab.