According to two charts showing data from 2015 and 2016: 1) Display advertising saw the largest growth rate at 17.5% and accounted for around 50% of total revenue in both 2015 and 2016. 2) Classifieds and directories saw the second highest growth rate at 17.9% and accounted for approximately 13% of revenue each year. 3) Search engine marketing (SEM) accounted for the largest portion of revenue at around 33-34% each year but saw the lowest growth rate of 8.9% between 2015 and 2016.