SlideShare is a hosting service that allows users to upload and share presentations, documents, videos, and other files. Content can be viewed on the site, mobile devices, or embedded on other websites. As a teacher, SlideShare is a useful tool for sharing documents, practicing pronunciation with audio and video, and developing language skills through student-created dialogues, explanations of topics, and other interactive content. It makes classes more engaging by allowing innovative and didactic teaching methods where students can participate by creating their own videos or files to practice the language.