This document discusses online display advertising and banner ad effectiveness. It provides information on different types of display ads like banner ads, interstitial banners, pop-ups, etc. It also discusses factors that influence banner ad effectiveness such as viewability, click-through rate (CTR), emotional appeals, incentives, credibility and acquiring the right customer. The document recommends that to maximize effectiveness, advertisers should consider viewability, optimize ad formats for higher CTR and focus on building brand image and credibility in addition to direct response. It also discusses how to allocate budgets optimally between content placement and ad networks to achieve higher CTR while minimizing risk.