Brian Wieser is Global President, Business Intelligence for GroupM, WPP’s world-leading media investment Group. He is leading and driving GroupM’s thought leadership practice focused on driving actionable marketplace intelligence on markets, audiences, partners, platforms, and supply and demand dynamics. Brian is the lead author for This Year Next Year, GroupM’s highly regarded bi-annual ad forecasts on media buying and investment both globally and regionally and also provides regular analysis and perspective on the top trends impacting media and marketing.