This document discusses the transition in online advertising from a focus on impressions and clicks to accountability and transparency. It notes that in 2010, the online advertising market was dominated by supply factors like impressions, but by 2016 demand was driving the market towards transparency and accountability. The document outlines metrics for online accountability including time in screen, time in audience, and time in branding. It provides examples comparing the performance of half-page versus billboard ads across visibility, time in view, and cost per quality view. Finally, it discusses trends towards greater competition on transparency and integrated campaign management, and predicts that accountability will become leading and rate cards will be used less.