After experimenting with tweets on Google's desktop results, Google has made this feature live for all English searchers globally.
Google has officially announced on Twitter, as well in as anupdated post on the Google blog, that they have expanded displaying Twitter content — Tweets — in the Google desktop search results.
Read more on http://searchengineland.com/google-officially-expands-twitter-into-desktop-search-results-228723
Original article by Barry Schwartz, http://searchengineland.com/