Blogs are one of the more popular technologies of Web 2.0. They have enabled anyone to start publishing and expressing theri ideas on the Web.
“Blog” is an abbreviated version of “weblog,” which is a term used to describe web sites that maintain an ongoing chronicle of information. A blog is a frequently updated, personal website featuring diary-type commentary and links to articles on other Web sites. Blogs range from the personal to the political, and can focus on one narrow subject or a whole range of subjects.
Many blogs focus on a particular topic, such as web design, home staging, sports, or mobile technology. Some are more eclectic, presenting links to all types of other sites. And others are more like personal journals, presenting the author’s daily life and thoughts.
Generally speaking blogs tend to have a few things in common:
- A main content area with articles listed chronologically, newest on top. Often, the articles are organized into categories.
- An archive of older articles.
- A way for people to leave comments about the articles.
- A list of links to other related sites, sometimes called a “blogroll”.
- One or more “feeds” like RSS, Atom or RDF files.
Taken from http://codex.wordpress.org/Introduction_to_Blogging
Web 2.0: Who, What, Why, How 