LinkedIn SlideShare is a Web 2.0–based slide hosting service. Users can upload files privately or publicly in the following file formats: PowerPoint, PDF, Keynote or Open Document presentations. Slide decks can then be viewed on the site itself, on hand held devices or embedded on other sites. Launched on October 4, 2006, the website is considered to be similar to YouTube, but for slideshows. It was acquired by LinkedIn in 2012. The website was originally meant to be used for business to share slides among employees more easily, but it has since expanded to also become a host of a large number of slides that are uploaded merely to entertain. Although the website is primarily a slide hosting service, it also supports documents, PDFs, videos and webinars. SlideShare also provides users the ability to rate, comment on, and share the uploaded content.
The website gets an estimated 70 million unique visitors a month, and has about 38 million registered users. SlideShare’s biggest competitors include Scribd.com, Issuu and edocr. Some of the notable users of SlideShare include The White House, NASA, World Economic Forum, State of Utah, O’Reilly Media, Hewlett Packard and IBM.