BLOG ,What is it???

The first question that came to my mind when I started googling was blog and the question was what is ablog and how cane we define a blog ..

A blog is a website in which items are posted on a regular basis and displayed in reverse chronological order. The term blog is a shortened form of weblog or web log. Authoring a blog, maintaining a blog or adding an article to an existing blog is called “blogging”. A person who posts these entries is called a “blogger”. A blog comprises text, hypertext, images, and links (to other web pages and to video, audio and other files). Blogs use a conversational style of documentation.
Blogging really does make sense because it can serve as a platform for so many other tactics including SEO, email (archiving newsletters), blogger relations, PR, viral marketing, a compliment to the corporate site, a touch point for social networking and a place to promote webinars.