What is a ‘blog’?
Wikipedia defines ‘blog‘ as follows:
A blog (a portmanteau of web log) is a website where 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), sketchblog, videos (vlog), music (MP3 blog), audio (podcasting) are part of a wider network of social media. Micro-blogging is another type of blogging which consists of blogs with very short posts.
Other definitions of Blog:
A blog (short for weblog) is a personal online journal that is frequently updated and intended for general public consumption. Blogs are defined by their format: a series of entries posted to a single page in reverse-chronological order.Blogs generally represent the personality of the author or reflect the purpose of the Web site that hosts the blog. Topics sometimes include brief philosophical musings, commentary on Internet and other social issues, and links to other sites the author favors, especially those that support a point being made on a post.
The author of a blog is often referred to as a blogger. Many blogs syndicate their content to subscribers using RSS, a popular content distribution tool.
For more information, see weblog.
Blog – A frequent, chronological publication of personal thoughts and Web links.
A blog is often a mixture of what is happening in a person’s life and what is happening on the Web, a kind of hybrid diary/guide site, although there are as many unique types of blogs as there are people.
People maintained blogs long before the term was coined, but the trend gained momentum with the introduction of automated published systems, most notably Blogger at blogger.com. Thousands of people use services such as Blogger to simplify and accelerate the publishing process.
Blogs are alternatively called web logs or weblogs. However, “blog” seems less likely to cause confusion, as “web log” can also mean a server’s log files.
How to write a better blog – http://www.alistapart.com/stories/writebetter/