The document provides an overview of the online display advertising ecosystem, including key players like DSPs, exchanges, SSPs and publishers. It discusses how the ecosystem has evolved from pre-2005, when agencies bought direct from publishers, to today, where DSPs allow agencies to buy across multiple exchanges and inventory sources. The opportunity for ad trading in Asia is also examined, as the region has fewer players compared to more developed markets. Finally, the document introduces Adz as a marketplace that aims to connect all players in Asia and provide benefits like transparency, access to multiple channels and optimisation tools.