What is a Blog?
blog (a contraction of the term “Web log“) is a Web site, usually maintained by an individual,[citation needed] with regular entries of commentary, descriptions of events, or other material such as graphics or video. Entries are commonly displayed in reverse-chronological order. “Blog” can also be used as a verb, meaning to maintain or add content to a blog
Blog is a place to communicate with other person. You can get information by the blog or you can give the information to the other people. Moreover there is lot of blogs of variety of topics.
