When Yahoo! detects a hot topic being queried on their search engine, their algorithm will select Tweets to present in the results.
When Tweets do appear, they'll usually be placed at the bottom of the results.
Image via Yahoo! search blog
Meet Your Favorite Search Engine Watch Contributors
Many of SEW's leading expert contributors will be at ClickZ Live, the new online and digital marketing event kicking off in New York (March 31-April 3). Hear from the likes of: Thom Craver, Josh Braaten, Lisa Barone, Simon Heseltine, Josh McCoy, Lisa Raehsler, Greg Jarboe, Dan Cristo, Joseph Kerschbaum, John Gagnon, Eric Enge and more!