This document discusses different types of media and how they summarize content. It describes e-newspapers, e-magazines, CD/DVD covers, book covers, instruction manuals, advertisements, and websites. These media provide visual references and previews to help audiences understand the content at a glance without needing to view or read it in full. They convey essential information like subjects, creators, and genres through images and short text. This allows audiences to easily identify and decide whether they want to engage with the media.