I was put this question by a professor recently during a casual discussion on Indian blogging and Hindu blogs. I went to give a conventional answer that you get to see in Wikipedia.
A blog is a user-generated website where entries are made in journal style and displayed in a reverse chronological order.Blogs often provide commentary or news on a particular subject, such as food, politics, or local news; some 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.
Well I did not just mug up and say word by word but I said something like this.
But I wanted to say something else and I was hesitant. Perhaps there lies the importance of blogs; it opens up even an introvert.