The document discusses designing effective banner ads for computer games. It provides tips for banner ad design such as using color, animation, keywords, and keeping it simple and relevant. A study found that banner ads designed to accomplish three key objectives, such as matching the messaging on the landing page, drove a 285% increase in conversions compared to other banner ad treatments. The document then discusses designing banner ads for mobile games and apps, providing feedback on initial drafts which emphasized using themes from the game in a simple design.