SlideShare is a website that allows users to upload and share presentations. It was launched in 2006 and now hosts over 18 million pieces of content. While originally for business use, it is now open for anyone to view uploaded slideshows. It has benefits like easy embedding, tapping into its large audience, and being low cost or free. To use SlideShare effectively, content should be high quality, use keywords, provide valuable insights, and be shared on other social channels. However, there is no built-in analytics and users must use other tools to create slides. Overall, SlideShare is a good opportunity for marketers if they create strategic, high-quality content.