Twitter users often share multiple numbered tweets on a topic or idea, and this practice is generally referred to as a "tweetstorm." With Threads, two or more tweets can be linked, simplifying and streamlining the tweetstorm concept.
When you create a tweet on Twitter, you can use the "+" button to add more tweets to the original tweet in the compose window. All of your tweets can be drafted ahead of time and then sent out at once using the new "Tweet All" button.
Tweets can also be added to a published thread using the "Add Another Tweet" button, and when browsing Twitter, there's a new "Show this thread" label that makes it easier to find a series of linked tweets.
Twitter says that the new Threads feature is designed for people who want to serialize a longer story or thought or provide ongoing commentary on a particular event or topic.
Threads is the second major change that's been made to Twitter in recent weeks, following a decision to increase the character limit from 140 to 280 characters to give Twitter users more room to express themselves.
Twitter says the new Threads feature is rolling out to iOS, Android, and the web "in the coming weeks."