A blog is basically a journal that is available on the web. A blog also called a web-log is a type of web site. Blogs are written and are typically updated on regular basis.
Blog is a frequent, chronological publication of personal thoughts and web links, that is usually arranged from the most recent post (or entry) at the top of the main page where featured most prominantly and the older entries towards the bottom.
A blog is a personal diary. A collaborative space. A political soapbox. A breaking-news outlet. A collection of links. Your own private thoughts. Memos to the world. –Blogger
Create a blog using Google's Blogger
A blog (a contraction of the term "web log") is a type of 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. - wikipedia
The activity of updating a blog is “blogging” and someone who keeps a blog is a “blogger.”
Blogs are usually updated daily or regularly using software that allows people with little or no technical background to update and maintain the blog.
Blogs are often written usually on a particular topic – there are blogs on virtually any topic you can think of. From charity works, products promotion, recipes, personal diaries, hobbies.
Blogs usually have the two main features namely Archives and Comments which is briefly explained below.
Archives of a blog
The front page of a blog will show only the recent entries. Some major blogs could have as many as thousands of posts or pages. These contents could be found in the Archives section of the blog under the month or year the entry was made. In some blogs previous posts are available in Categories section. For example, you could see the Archives and Categories on the right and left sections in this Blog you are reading now.
Comments to posts in a blog
Another feature in blogs is to allow comments by the reader. Many blogs allow comments but some do not. In this Blog comments are enabled and you can give me feedback on almost everything I write simply by clicking the ‘comments’ link at the bottom of each one of my posts.
Create a blog for free using Google's Blogger.