This document discusses media buying and how it impacts search engine marketing. It defines media buying as purchasing display media like banner ads through contracts. It explains the types of display ad networks and who typically does media buying, like both brand and direct response advertisers. The document provides tips for executing and optimizing media buys, like setting goals, analyzing data, and testing ads. It also explains how display advertising can drive searches and how media buying capabilities have increased, leading the author to shift focus away from search engine optimization.