AdSense is a free, simple way to earn money by displaying targeted ads next to your online content. With AdSense, you can show relevant and engaging ads to your site visitors and even customize the look and feel of ads to match your website. Nowadays, advertising agents using this to reach high revenue. Here the infographic to show you more about the ad’s and its viewability factors. In detail it explains how ad’s should be, how ad’s should be placed and what factors to consider. Hope this is useful.