What is a blog?

A blog is a place where someone can share his/her ideas and thoughts.  The blogger can post anything he/she thinks, and others can read and comment their reaction to the original post.  This can lead to valuable discussions and give new perspectives to anyone reading the blog and comments about the blog.  This is my first time owning or even reading a blog, and I am looking forward to the new form of communication (new to me, at least).  I think a blog can spark more ideas than formal writing in some ways because the writer and the people commenting on the ideas of the blogger can focus less on making what they need to say sound nice, and just write the raw idea, without any fluff.