The word blog is a combination of the words "Web and Log." The word "blog" has also evolved into a verb, referring to the actual act of adding content or creating content for web logs.
Blogs are as diverse as the internet using population itself but usually provide commentary or analysis of subjects ranging from politics to personal experiences. The interface allows text and images, as well as links to other web sites related to the subject. This facilitates rich presentations of subjects with only a few clicks of the mouse. For example, a commentary on a recent political speech may provide an embedded link to a video of the speech on YouTube, or link to an article about the speech in the New York Times.
Readers on most blogs are given permission to comment in an interactive computer interface format which is then visible by all subsequent readers. This lends a sense of community to many blogs and promotes the concept of web 2.0.
"In May 2007, blog search engine Technorati was tracking more than 71 million blogs."
- http://justtv.wordpress.com/ Professor Jason Mittell's Blog, "Just TV"