This document discusses whether and how to use PowerPoint to supplement presentations. It notes that using PowerPoint depends on who is presenting and the topic. Common mistakes include putting all spoken words on slides, making slides crowded, and losing audience attention. Instead, slides should use key bullet points and pictures with minimal text. Research shows people learn better when extraneous information is removed from slides and there is no duplication between oral and visual content. Effective slides focus on visuals, few words, and consistency in messaging to keep the audience engaged.