BRUSSELS — Digital giants Facebook, YouTube and Twitter, in collaboration with marketers and agencies through the Global Alliance for Responsible Media, have agreed to adopt a common set of definitions for hate speech and other harmful content and to collaboratively monitor industry efforts to improve digital safety, the World Federation of Advertisers (WFA) announced today. The Global Alliance for Responsible Media (GARM) is a cross-industry initiative founded and led by the WFA and supported by other advertising trade bodies, including the Association of National Advertisers (ANA), the Incorporated Society of British Advertisers (ISBA), and the American Association of Advertising Agencies...