Is blogging a revolution in this era?

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It isnt too obvious that action's speak louder than words! 2-3 year's back it was common for a commonman to blabber something about a topic, But time has taken a swift wth the upcoming of blogs via which people can fire up what they feel or what they want to write, with equal participation of all internet users What do you think about it? Is it a neccessity to own a blog?