Martin Sorrell on Newspaper Digital Ad Slowdown: 'Paywalls are The Way to Go'

Sir Martin Sorrell has said that the slowdown in digital newspaper advertising growth is proof that publishers should have paywalls.

Speaking at the Society of Editors conference, the WPP chief executive said that a range of factors are contributing to clients reassessing the efficacy of digital ad spend levels, which will make it difficult for publishers solely relying on digital advertising income.