This algorithm looks at all kinds of interactions with Tweets including retweets, favorites, and more to identify the Tweets with the highest velocity beyond expectations. One thing to note is this is intended to highlight Tweets from all users and doesn’t favor those with large follower counts.
With the new design, we’re intentionally featuring more dynamic content on the front page, revealing a sample of who’s here, what folks are tweeting about, and the big topics that they’re discussing. The homepage now features a set of algorithmically-selected top tweets that automatically appear every few seconds…People who internalize the value of Twitter understand the power of this simple medium. But it hasn’t been easy to make that value transparent or obvious for curious folks coming to Twitter for the first time.