A blog (a contraction of the term weblog) is a website, usually maintained by an individual 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.

Many blogs provide commentary or news on a particular subject; others function as more personal online diaries. A typical blog combines text, images, and links to other blogs, Web pages, and other media related to its topic. The ability for readers to leave comments in an interactive format is an important part of many blogs. Most blogs are primarily textual, although some focus on art (artlog), photographs (photoblog), sketches (sketchblog), videos (vlog), music (MP3 blog), audio (podcasting), which are part of a wider network of social media. Micro-blogging is another type of blogging, one which consists of blogs with very short posts. As of December 2007, blog search engine Technorati was tracking more than 112 million blogs.[1] With the advent of video blogging, the word blog has taken on an even looser meaning ? that of any bit of media wherein the subject expresses his opinion or simply talks about something.

Generally speaking (although there are exceptions), 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.

Some blogs may have additional features beyond these.

The Blog Content

Content is the essential purpose for any web site. Retail sites feature a catalog of products. University sites contain information about their campuses, curriculum, and faculty. News sites show the latest news stories. For a personal blog, you might have a bunch of observations, or reviews. Without some sort of updated content, there is little reason to visit a web site more than once.

On a blog, the content consists of articles (also sometimes called “posts” or “entries“) that the author(s) writes. Yes, some blogs have multiple authors, each writing his/her own articles. Typically, blog authors compose their articles in a web-based interface, built into the blogging system itself. Some blogging systems also support the ability to use stand-along client tools, which allows authors to write articles offline and upload them at a later time.

Comments

Want an interactive website? Wouldn’t it be nice if the readers of a website could leave comments, tips or impressions about the site or a specific article? With blogs, they can! Posting comments is one of the most exciting features of blogs.

Most blogs have a method to allow visitors to leave comments. There are also nifty ways for authors of other blogs to leave comments without even visiting the blog! Called “pingbacks” or “trackbacks“, they can inform other bloggers whenever they cite an article from another site in their own articles. All this ensures that online conversations can be maintained painlessly among various site users and websites.