earnings call this morning (24 August) WPP CEO , Sir Martin Smith has predicted that digital ad spend is to slow over the next few years . He revealed how one of the agency 's major clients , Procter & Gamble , was pulling back on its Facebook ad campaign , and said that issues surrounding ad - blocking , fraud , viewability and measurement are " where the problem is . " He believes that the regulatory bodies should be holding Google and Facebook to account .
WPP CEO , Sir Martin Smith has predicted that digital ad spend is to slow over the next few years . He revealed how one of the agency 's major clients , Procter & Gamble , was pulling back on its Facebook ad campaign , and said that issues surrounding ad - blocking , fraud , viewability and measurement are " where the problem is . " He believes that the regulatory bodies should be holding Google and Facebook to account .