Google Buzz is a tool to build or get involved in a happening conversation. It’s similar to Twitter’s timeline, and Facebook’s live feed. But the difference is Buzz is built inside Gmail. We don’t need to start from scratch.
Followers will be automatically added with the people we email and chatted the most. Google Buzz can also integrate with huge social web such as Picasa, YouTube, Blogspot, Flickr, even Twitter. That means any activity you do on those connected site will be posted in Buzz.
One more thing, because Google Buzz is inside Gmail, we can still track incoming email while Buzzing around.