The Executive Roundtable: Brian Wieser, GroupM | How COVID-19 Changed Media Spending | May 20, 2020

How is the coronavirus changing media spending? eMarketer co-founder and Insider Intelligence chief evangelist Geoffrey Ramsey discusses this with Brian Wieser, global president of business intelligence at GroupM, during the inaugural episode of "The Executive Roundtable." This new "Behind the Numbers" show brings you inside the mind of some of the industry's most influential voices.