Video Is Least Measurable Ad Channel: eMarketer Study

Readers who are deeply engaged with TV measurement may be excited that Xandr used multiple TV currencies in its upfront ad sales.  The rest of us will be more interested in this eMarketer study, which offers a good overview of ad measurement in general.  It turns out that just 50% of marketers are satisfied with measurement in the best of channels, and video is the least measurable of all.