Blogs have become very influential on the tone and editorial direction of news reporting. In a blog you get to set the topic of the conversation which gives a person the power to focus on a certain event or idea. If enough people write about a certain topic than their opinions have a direct impact on how people view the subject.
Blogs inform the public about bias in media, they play a watchdog role of the media. They raise money for causes or candidates, they form rallies, and push people to vote. Another benefit is that you get news much faster from a blog than mainstream media. You also get to the view the story from different angles.
You can see the power of blogs and other new media sources such as twitter and facebook in the Egyptian uprisings. The government saw these social media channels as a big threat which resulted in the internet being shutdown across the nation. There has been a great change in how knowledge is shared today. It is important to see that the voices of these new social media channels have power, they have to power to create change.