This document discusses programmatic advertising and issues related to it. It provides definitions of key terms like programmatic trading. It also summarizes data on the growth of programmatic advertising in the UK, finding that it accounted for 45% of online display advertising in 2014, up from 28% in 2013. The document also examines factors that may continue driving future growth of programmatic and discusses some concerns of media owners, like fraud, data leakage, and lack of viewability standards.