Blogs           (short for weblog) is an informal website consisting of time-stamped articles, or posts, in a diary or journal format, 

                      usually listed in reverse chronological order.

  Blogosphere           refers to the worldwide collection of blogs.

   Video blog/Vlog           blog that contains video.

   Microblog            allows users to publish short messages usually between 100 and 200 characters,

                                  for others to read.

   Blogger/Website visitor            the author that reflect the interests, opinions, and personalities through blog.