What, you never used Google Buzz? Of course you didn't. It was a notorious failure. But now it's dead. Into a digital burial ground next to Wave and MySpace. Oh, MySpace is still running?
"What did we learn from Buzz? Plenty. We learned privacy is not a feature… it is foundational to the product. And this awareness gave us the resolve to design privacy in from the very beginning, which led to Circles for sharing the right information with the right people, as well as transparency around which parts of your profile can be seen by whom. We also learned how compelling it is to have meaningful conversations with interesting people, which we’re happy to see happening all the time in Google+."
Buzz, which was baked into the sidepanel of Gmail, will disappear "within a few weeks." If you have things posted to the service, those will live on in your Google profile.