The document discusses the history and types of social media and blogs. It explains that social media evolved from traditional broadcast media by allowing many-to-many communication. Various types of social media are described, including blogs, microblogs, social networking sites, media sharing sites, social news/bookmarking sites, and online forums. Different types of blogs are also outlined such as personal blogs, news blogs, collaborative blogs, and more. The rise of the term "blog" is summarized, noting it was created by truncating "web log" in the late 1990s and was added to the Oxford English Dictionary in 2003.