Its same as Twitter but will not be popular that much. It even had some privacy concerns and it is now rectified.
It's a new social media site from Big G, the feel and look could be compared to Twitter. It came underfire a week after it was launch due to its privacy violations and security flaws, although Google is quick in tweaking unwanted features and fixing security bugs. Overall, Google Buzz is a great innovation, a welcome change to the usual social media sites we're used to.