PowerPoint is commonly used presentation software that allows the creation of slides with images, video, sound and other content that can be published and shared online. Other presentation sharing sites include SlideShare, Authorstream and SlideBurner, which enable uploading and publicly or privately sharing PowerPoint files, documents and other formats. Using presentation tools in teaching can help students better understand and retain topics by incorporating visual elements to keep them motivated and focused on learning. Sharing presentations also makes it possible to disseminate and expose information in various fields in an engaging way.