WPP tops Effie Index for fourth year in a row
GLOBAL - WPP has topped the Effie Index as the most effective agency holding group globally for the fourth year in a row, as Omnicom's BBDO is named the most effective ad network.
by Maisie McCabe
GLOBAL - WPP has topped the Effie Index as the most effective agency holding group globally for the fourth year in a row, as Omnicom's BBDO is named the most effective ad network.
by Maisie McCabe