1) Powerpoint is a presentation tool developed by Microsoft that allows users to create flexible presentations using text, images, videos and other media. 2) Effective Powerpoint presentations involve considering strategies like choosing themes that fit your content, limiting sentences per slide, speaking without reading slides, understanding the presentation sequence, and using visuals to engage audiences. 3) Key tips for an outstanding Powerpoint presentation include practicing with the tool, advancing slides slowly, prioritizing content over design, having energetic introductions and conclusions, managing timing and animations appropriately, using readable fonts and color schemes, and limiting animations on important text.