Business Insider - Thomson Reuters Facebook (NASDAQ:FB) had another great year in 2015. As the social network surpassed expectations, the stock rose an impressive 34%. Looking back on the year, here are three charts to help illustrate the company's excellent performance.1. Mobile ad revenue continued to soar The Motley Fool While it may not have been the main driver for the stock in 2015, Facebook's effective monetization of its mobile platform has been a key driver for the stock's overall rise since it went public in 2012. The social network's ability to turn its mobile news feed into a lucrative and compelling advertising medium for marketers has driven rapid growth in mobile advertising revenue for the company and a key catalyst for overall business growth. This trend continued into 2015 and is evident when examining Facebook's mobile ad revenue as a percentage of total ad revenue. While this figure may not be rising as rapidly as it was when the company first started rolling out mobile ads in 20
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