The document discusses the history and format of blogs. It defines blogs as websites where entries are displayed in reverse chronological order. The key aspects of blog format mentioned are links within posts, tags or categories to organize posts, blogrolls to showcase other blogs, and the inclusion of images, video, audio and comments. Examples are given of blog templates, elements and the posting screen. The differences between posts and pages are outlined. Tips are provided on starting a blog using free blog hosting services.