For many years, we would hear "This is the year of mobile." From the first half (1H) of 2017 to the first half of 2018, mobile advertising did increase 42%, noted an IAB Internet Ad Revenue report conducted by PWC. By 2021, mobile video is expected to reach approximately $16.2 billion. Snapchat, the messaging and social media app, recognized the potential of this medium and capitalized on the expanding market. But, that doesn't seem to be what advertisers are focused on today. According to them, this is "the year of audio." Find out why now!