In the last period, Y14-Q1, the largest presented item is Google Ad with ARPU of 45. The fastest growing participant in our report is Twitter Ad with 175.19% growth in ARPU over 9 quarters between Y12-Q1 to Y14-Q1. The topic that suffers from the biggest downturn is Facebook ad with 54.75% decline over the same period. This report represents data points consolidated from 2 sources: KPCB and Techinasia