Facebook ads have revolutionized the social media space. More & more companies are joining the online promotion through serving ads on Facebook. With more than 500 million members, facebook provides a great place for advertisers. As can be seen from the chart, CTR is highest for Tabloids, blogs, Media & entertainment sector. This is due to the high number of members in the younger age group. While the CPC is highest for healthcare. internet & software of which facebok is a part of has a low CTR. This chart shows up some interesting trends. URL: http://www.businessinsider.com/embed?id=4d4719accadcbbd84a110000