How does +1 work with Buzz? Do we still need the Google Buzz button?

Buzz buttons are used for starting conversations about interesting web content ("Hey guys, what do you think about this news story?"). +1 buttons recommend web content to people in the context of search results ("Peng +1’d this page"), and +1's from social connections can help improve the relevance of the results you see in Google Search. You can use the +1 button, or the Buzz button, or both—pick what’s right for your content.