Individual blogs are written by a single author and can be personal diaries, political commentary, or thoughtful reflections on daily life and events. Collaborative blogs are written by more than one person about a specific topic and can be open to all or limited to a group. There are also corporate, directory, format, friend, and topical blogs that specialize in official company information, collecting resources, specific presentation types, posts by friends, and niche topics respectively. The document discusses the different types of individual and group blogs.