Excerpted from article on Search Engine Watch:
"With Twitter being a source of news for so many people, a new feature it’s testing that essentially curates the content behind the topic seems like a logical fit. “Embedded on these websites” is the header for the new functionality that is showing links to articles online that have embedded the tweet.
"Embedded tweets allow users to insert interactive tweets within their articles that feature media like photos and video, show real-time retweets and favorites, and give the ability to engage with the tweet right within the article..."
Read full original article:
How to embed an interactive tweet:: https://dev.twitter.com/docs/embedded-tweets
Via Giuseppe Mauriello