Ad spend on over-the-top (OTT) streaming video will increase 20% this year to $2.6 billion, according to a Winterberry Group study of US ad spend data. Despite OTT’s surge, it’s still small compared with the $69.2 billion that Winterberry Group estimates US advertisers will spend on linear TV. For some advertisers, measurement challenges prevent them from investing more in OTT.
Source : Why Are OTT Video Ads Difficult To Track and Measure? – eMarketer Trends, Forecasts & Statistics