The document defines a blog as a shortened form of weblog that allows individuals to author and maintain articles called blog posts or entries. It notes that blogs require no technical knowledge, allow readers to comment, and are automatically organized with categories and archives. Blogs also act as search engine magnets and allow instant distribution of information via RSS. The document provides examples of using personal and business blogs for discussing views, marketing, building relationships and enhancing SEO. It offers tips for planning blog content by defining the audience, purpose, topics and frequency of posts.