Web logs, or blogs, have quickly become one of the most popular uses of the Web. A blog is really nothing more than a Web site whose content is updated frequently and is generally presented in reverse chronological order. Many blogs are the online diaries of their owners, but increasingly, blogs are being used to provide much or all of the content for sites.
Blogs have been around since the early days of the Web. In fact, some trace the history of blogs to the days of Usenet, before the invention of the Web. The term weblog was coined by John Barger in 1997, while Peter Merholz broke the word up, as a joke, into we blog in 1999, thus creating the term that has remained in use to today.