If you are a small site adding ad units to your pages then the advice we give you is simple: on every page you should add a 728×90 at the very top, a 300×250 on the top right and a 300×600 in the left ...
A new crop of ad units is on the rise as mobile and social inventory expands, independent trading desk Accordant Media reported in a Q1 analysis. Although 70% of total real-time bidded (RTB) display ...