Digital advertisement expenditure will account for half of the world's ad spending for the first time in 2021, a Japanese advertising giant said Thursday, as internet use becomes more pervasive.While the global ad industry was hit hard last year by the impact of the coronavirus pandemic on businesses, Dentsu Group Inc. forecasts a rebound in the market this year by 5.8 percent from the previous year to around $579 billion.Data on the predicted growth of global ad spending between 2020 and 2022 is based on research in 59 countries and regions.Dentsu said the global market shrunk by 8.8 perce…READ FULL ARTICLE