Yang Han, co-founder and CTO of Toronto-based ad tech company StackAdapt, tells BNN Bloomberg how they have scaled up from 150 employees in Toronto three years ago to over a thousand in 15 countries. He says current economic conditions have not impacted their business as they are still in the growth phase and are acquiring new customers. He explains how AI is used in ad tech and how self-serve demand-side platforms like StackAdapt help advertisers maximise their ROI. He says their primary market is the US, but they are expanding in Canada, Europe, south-east Asia and other regions.