Yahoo Buzz is a clone of Digg, but exists within the Yahoo world. You submit a news story, and then get your friends within the system to vote it up the rankings. NOTE: There are no categories related to marketing.
Yes it help in seo you get traffic it is same digg submit your story in Yahoo Buzz and invite you friends for vote...
It's focused on traditional news, entertainment, and sports. It won't be dominated by linux dorks or Paul-tards. It can't be gamed by a small horde of myopic dweebs." For this reason, I like what Yahoo has done. As for the UI, Digg might be a little cleaner, but just a little. Both are about content, and Yahoo's UI doesn't get in the way by any stretch of the imagination. The only disappointing thing about Y! Buzz as far as I'm concerned is the absence of an RSS feed. Maybe they'll add one, but I'm not holding my breath, since they'd lose the page views.
Yahoo buzz is just to create buzz over net. Something like stubleupon or digg. It gives nofollow link. If you are looking for the best on SEO, then you should concentrate on high PR dofollow social bookmarking sites.