GroupM Agencies: How the World’s Largest Media Group Scales
GroupM is the world’s largest media investment group, responsible for roughly a third of all global media spend. Its agency network, which includes WPP-owned brands like Mindshare, Wavemaker, EssenceMediacom, and mSix&Partners, operates at a scale that most marketers will never encounter directly but whose decisions shape the entire digital advertising ecosystem. Understanding how GroupM agencies…
