Microsoft's voice-activated personal assistant Cortana has been showcased across the UK in an ad campaign that reacts in real time to surroundings. Dentsu Aegis Network, LivePoster and m:united (McCann Worldgroup's Microsoft team) have made the most of data sources and out-of-home (OOH) tech to tailor contextual, real time ads throughout the UK. The executions, boasting the versatility of the digital assistant, are capable of delivering thousands of engaging, geo-specific ads to consumers.