In the last period, 2017, the largest presented item is Google Ad with Market Share of 35.4%. The fastest growing participant in our report is Twitter Digital Ad with 94.12% growth in Market Share over 4 years between 2014 to 2017. The topic that suffers from the biggest downturn is IAC Digital Ad with 33.33% decline over the same period. This report is based on data published by eMarketer