The document describes how a Glog allows students to create an online poster using various multimedia elements like images, video, sound, and hyperlinks. Some key benefits of a Glog mentioned are that it is free, web-based, uses no ink or paper, and can incorporate student research and address different learning styles. Instructions are provided on how to set up a Glog account and add elements like text, titles, images, video, and audio to create an online poster.